Academic article

• Lucia Muggia; Riccardo Mancinelli; Tor Tønsberg et al. (2017). Molecular analyses uncover the phylogenetic placement of the lichenized hyphomycetous genus Cheiromycina. (external link)
• Karen L. Dillman; Teuvo Ahti; Curtis R. Björk et al. (2012). New records, range extensions and nomenclatural innovations for lichens and lichenicolous fungi from Alaska, USA. (external link)
• Toby Spribille; Tor Tønsberg; Edith Stabentheiner et al. (2014). Reassessing evolutionary relationships in the filamentous cyanolichen genus Spilonema (Peltigerales, Lecanoromycetes). (external link)
• Tor Tønsberg; Yngvar Gauslaa; Reidar Haugan et al. (1996). The threatened macrolichens of Norway - 1995. (external link)
• Tor Tønsberg; I. M. Brodo (1992). Enterographa zonata and Opegrapha gyrocarpa, new to North America. (external link)
• Tor Tønsberg; T. Goward (1992). Cladonia norvegica new to North America. (external link)
• Aino Henssen; Tor Tønsberg (2000). Spilonemella, a new genus of cyanophilic lichens with species from North America and Japan (Coccocarpiaceae). (external link)
• Tor Tønsberg (1992). Fellhanera new to Norway. (external link)
• P.M. McCarthy; Tor Tønsberg (1998). Porina radicicola, a new lichen from western North America. (external link)
• Håkon Holien; Tor Tønsberg (2008). Xylographa soralifera, a new species in the X. vitiligo complex. (external link)
• M. Hutten; Ulf Arup; O. Breuss et al. (2013). Lichens and Lichenicolous Fungi of Yosemite National Park, California. (external link)
• M. Hauck; Tor Tønsberg; H. Mayrhofer et al. (2013). New records of lichen species from western Mongolia. (external link)
• Tor Tønsberg (1994). Additions to the lichen flora of North America III. Halecania viridescens and Opegrapha sorediifera. (external link)
• Tor Tønsberg; John I. Johnsen (2011). Micarea viridileprosa new to Norway. (external link)
• Einar Timdal; Tor Tønsberg (2006). Psoroma paleaceum comb. nov. the only hairy Psoroma in northern Europe. (external link)
• Håkon Holien; Tor Tønsberg (2008). Xylographa soralifera : a new species in the X. vitiligo complex. (external link)
• Arve Elvebakk; Tor Tønsberg (2018). Psoroma spinuliferum (Pannariaceae), a new corticolous lichen species from Alaska with two different types of cephalodia. (external link)
• Jir̂í Malíĉek; Z. Palice; Jan Vondrak et al. (2020). Japewia aliphatica (Lecanoraceae, lichenized Ascomycota), a new acidophilous, sorediate-blastidiate lichen from Europe. (external link)
• Tor Tønsberg; Aino Henssen (1999). Additions to the lichen flora of North America VIII. Santessoniella grisea new to North America. (external link)
• Heidi Lie Andersen; Tor Tønsberg (2023). Proposal to conserve the name Fuscidea against Maronea (lichenized Ascomycota). (external link)
• Håkon Holien; Tor Tønsberg (2012). Biatora kodiakensis confirmed from Europe. (external link)
• Per Magnus Jørgensen; Tor Tønsberg (1999). Notes on small species of Leptogium from Pacific North America. (external link)
• Reidar Haugan; Tor Tønsberg (2018). Lecidella varangrica sp. nov. from the Varanger Peninsula, northernmost Norway. (external link)
• Tor Tønsberg; Dag Olav Øvstedal (1995). Cladonia peziziformis new to Norway from a burnt Calluna heath. (external link)
• J.A. Elix; Tor Tønsberg (2004). Notes on the chemistry of some lichens, including four species of Lepraria. (external link)
• Tor Tønsberg (1995). Additions to the lichen flora of North America V. Arthonia stellaris. (external link)
• Tor Tønsberg; Heidi Lie Andersen (2019). Miriquidica majae, a new lichen species from oldgrowth Picea abies forests in central Norway. (external link)
• T. Spribille; Tor Tønsberg (2007). Mycoblastus marginatus, a new synonym for M. affinis (Mycoblastacea, Lichenized Ascomycota). (external link)
• Bruce McCune; Ulf Arup; Othmar Breuss et al. (2018). Biodiversity and ecology of lichens of Katmai and Lake Clark National Parks and Preserves, Alaska. (external link)
• Tor Tønsberg (2018). Jamesiella scotica new to Fennoscandia. (external link)
• Andreas Frisch; Jon T Klepsland; Zdenek Palice et al. (2020). New and noteworthy lichens and lichenicolous fungi from Norway. (external link)
• Juan Carlos Zamora; Måns Svensson; Roland Kirschner et al. (2018). Considerations and consequences of allowing DNA sequence data as types of fungal taxa. (external link)
• Christian Printzen; Stefan Ekman; Tor Tønsberg (2003). Phylogeography of Cavernularia hultenii: Evidence for slow genetic drift in a widely disjunct lichen. (external link)
• James C. Lendemer; Tor Tønsberg (2014). Lepraria brodoi (Stereocaulaceae, lichenized Ascomycetes), a new species from the temperate rainforests of western Canada and southeastern Alaska, U.S.A. (external link)
• Stefan Ekman; Tor Tønsberg (1996). A new species of Megalaria from the Norht American West Coast, and Notes on the Generic Circumscription. (external link)
• Dianne Fahselt; Marianna Krol; Norm Hüner et al. (2000). Pigmentation of Cladonia infected by the lichenicolous fungus Arthrorhaphis aeruginosa. (external link)
• Tor Tønsberg (1994). The lichen genus Solenopsora and the species S. vulturiensis new to Scandinavia. (external link)
• Tor Tønsberg (1998). Additions to the lichen flora of North America VI. (external link)
• H. Holien; Per Magnus Jørgensen; E. Timdal et al. (1994). Norske lavanavn, supplement. (external link)
• Per Gerhard Ihlen; Tor Tønsberg (1994). The distribution of Cladonia borealis Stenroos in Norway. (external link)
• Tor Tønsberg; Roman Türk (2015). Biatora aureolepra from Austria, new to Central Europe.. (external link)
• Endre Nygaard; Tor Tønsberg (2015). Liten eikelav Flavoparmelia soredians funnet ny for Norge i Stavanger. (external link)
• Tor Tønsberg; Trevor Goward (2016). Cliostomum spribillei (Ramalinaceae, lichenized Ascomycetes), a new species from Western North America. (external link)
• Tor Tønsberg (2016). Laven Fellhanera duplex ny for Norge og Fennoskandia. (external link)
• Bruce McCune; Ulf Arup; Othmar Breuss et al. (2020). Biodiversity and ecology of lichens of Kenai Fjords National Park, Alaska.. (external link)
• Tor Tønsberg (2011). Pertusaria mccroryae new to Europe. (external link)
• Sandrina Azevedo Rodrigues; Tor Tønsberg; Arsenio Terrón-Alfonso et al. (2011). Chrysothrix flavovirens, Lepraria elobata, and Ochrolechia arborea new to Portugal. (external link)
• Håkon Holien; Tor Tønsberg (2002). Two new species in the lichen genus Szczawinskia A. Funk. (external link)
• Toby Spribille; Alan M. Fryday; Sergio Pérez-Ortega et al. (2020). Lichens and associated fungi from Glacier Bay National Park, Alaska. (external link)
• Damien Ertz; Tor Tønsberg (2021). A new species of Sagiolechia (Sagiolechiaceae) from Norway, with lirelliform ascomata and 1-septate ascospores. (external link)
• Håkon Holien; Tor Tønsberg (2012). Ramboldia subcinnabarina revisited. (external link)
• J.A. Elix; Tor Tønsberg (2005). On the chemistry of Ramalina thrausta. (external link)
• Tor Tønsberg; J.I. Johnsen; Dag Olav Øvstedal (2005). Leptogium britannicum refound in Norway. (external link)
• Bruce McCune; Elisa Di Meglio; Tor Tønsberg et al. (2019). Five new crustose Stereocaulon species in western North America. (external link)
• Per Gerhard Ihlen; Tor Tønsberg (1996). The lichenicolous genus Lettauia in North America. (external link)
• Per Gerhard Ihlen; B. Owe-Larsson; Tor Tønsberg (2004). Arthonia biatoricola sp. nov. from north-western Europe and northern Pacific North America. (external link)
• Tor Tønsberg (2004). Additions to the lichen flora of Great Smoky Mountains National Park. (external link)
• Per Magnus Jørgensen; Tor Tønsberg (1999). Notes on small Leptogium species from Pacific North America. (external link)
• Stefan Ekman; Tor Tønsberg; Per Magnus Jørgensen (2019). The Sticta fuliginosa group in Norway and Sweden. (external link)
• John W. Sheard; James C. Lendemer; Toby Spribille et al. (2012). Further contributions to the genus Rinodina (Physciaceae, Lecanoromycetidae): two species new to science and a new record for the Canadian High Arctic. (external link)
• Tor Tønsberg (2013). Xylographa soralifera (lichenized Ascomycetes) new to Switzerland. (external link)
• Tor Tønsberg; Christian Printzen (2018). Biatora troendelagica new to North America from Alaska, USA. (external link)
• Mireia Giralt; Tor Tønsberg; Håkon Holien (2002). Notes on the misunderstood Buellia dives (Th. Fr.) Th. Fr. (external link)
• Philipp Resl; Helmut Mayrhofer; Stephen R. Clayden et al. (2016). Morphological, chemical and species delimitation analyses provide new taxonomic insights into two groups of Rinodina. (external link)
• John Sheard; Tor Tønsberg; John Inge Johnsen (2010). Rinodina orculata and R. roboris new to Fennoscandia. (external link)
• Stefan Ekman; Tor Tønsberg (2019). Biatora alnetorum (Ramalinaceae, Lecanorales), a new lichen species from western North America. (external link)
• Tor Tønsberg (1992). Rinodina sheardii, a new lichen species from northwest Europe and northwest North America. (external link)
• Yngvar Gauslaa; J. Anonby; G. Gaarder et al. (1992). Huldrestry, Usnea longissima, en sjelden urskogslav på Vestlandet. (external link)
• A. Elvebakk; Tor Tønsberg (1992). Additions to the lichen flora of Svalbard. (external link)
• Per G. Ihlen; Håkon Holien; Tor Tønsberg (2004). Two new species of Dactylospora (Dactylosporaceae, Lecanorales), with a key to the known species in Scandinavia. (external link)
• Dianne Fahselt; Marianna Krol; Norm Hüner et al. (2000). Pigmentation of Cladonia infected by the lichenicolous fungus Arthrorhaphis aeruginosa. (external link)
• James C. Lendemer; John W. Sheard; Göran Thor et al. (2012). Rinodina chrysidiata, a new species from far eastern Asia and the Appalachian Mountains of North America. (external link)
• Kathryn Beck; Katherine A. Glew; Amanda Hardman et al. (2023). Lichens of Cypress Island, Washington - the seen and the unseen. (external link)
• Tor Tønsberg; John Inge Johnsen (2008). Fuscidea lightfootii new to Fennoscandia. (external link)
• Tor Tønsberg (2016). Jamesiella scotica new to North America from USA, Alaska. (external link)
• Tor Tønsberg (1993). Collema leptaleum new to Europe. (external link)
• Tor Tønsberg (1993). Additions to the lichen flora of North America. (external link)
• Tor Tønsberg (1994). Chrysothrix flavovirens sp. nov. - the sorediate counterpart of C. chrysophthalma. (external link)
• Sandrina Azevedo Rodrigues; Arsenio Terrón-Alfonso; John A. Elix et al. (2011). Lecanora sorediomarginata, a new epiphytic lichen species discovered along the Portuguese coast. (external link)
• Lucia Muggia; Peter Nelson; Tim Wheeler et al. (2011). Convergent evolution of a symbiotic duet: The case of the lichen genus Polychidium (Peltigerales, Ascomycota). (external link)
• Mireia Giralt; Tor Tønsberg; Håkon Holien (2002). Notes on the misunderstood Buellia dives (Th. Fr.) Th. Fr. (external link)
• Francesco Petruzzellis; Enrico Boccato; Carlotta Musso et al. (2025). Evidence for decoupled water potential between myco- and photobionts during desiccation in the tripartite lichen Peltigera britannica. (external link)
• Tor Tønsberg (1999). Additions to the lichen flora of North America VII. Soem species found on Waadah Island, Washington. (external link)
• Tor Tønsberg (1999). Pseudocyphellaria arvidssonii new to Africa, and P. mallota new to North America. (external link)
• Christian Printzen; Tor Tønsberg (1999). The lichen genus Biatora in northwestern North America. (external link)
• Abbey L. Rosso; Bruce McCune; Tor Tønsberg et al. (1999). Lichens of an Old-Growth Forest in a Little Explored Area of Western Oregon, U.S.A. (external link)
• Tor Tønsberg; C. F. Culberson; A. Johnson (1995). 4-O-Methylcryptochlorophaeic acid found in Bacidia. (external link)
• J.A. Elix; Tor Tønsberg; J.H. Wardlaw (2004). The structure of friesiic acid. (external link)
• Per Gerhard Ihlen; Håkon Holien; Tor Tønsberg (2004). Two new species of Dactylospora (Dactylosporaceae, Lecanorales), with a key to the known species in Scandinavia. (external link)
• Per Magnus Jørgensen; Tor Tønsberg (2010). The lichen Bryoria bicolor found fertile in western Norway. (external link)
• Zdenek Palice; Tor Tønsberg (2016). Porpidia nadvornikiana new to Norway. (external link)
• Geir Gaarder; Tom Hellik Hofton; Håkon Holien et al. (2022). Lavfloraen på dødt organisk materiale under overhengende berg og steinblokker. (external link)
• Tor Tønsberg; Hans H. Blom; Bernard Goffinet et al. (2016). The cyanomorph of Ricasolia virens comb. nov. (Lobariaceae, lichenized Ascomycetes). (external link)
• Tom Carlberg; Per Magnus Jørgensen; Tor Tønsberg (2016). Scytinium singulare, a new lichen species from coastal California. (external link)
• Torbjørg Bjelland; Grete Halleraker; Tor Tønsberg (1997). The chemotypes of Cetrelia olivetorum in Norway. (external link)
• Einar Timdal; Tor Tønsberg (2012). Cladonia straminea, the correct name for C. metacorallifera. (external link)
• Martina Zahradnikova; Tor Tønsberg; Heidi Lie Andersen (2017). The taxonomy of the lichen Fuscidea cyathoides (Fuscideaceae, Umbilicario¬mycetidae, Ascomycota) in Europe.. (external link)
• Tor Tønsberg (2018). Varicellaria lactea new to the U.S.A. from Alaska. (external link)
• Christian Printzen; Toby Spribille; Tor Tønsberg (2008). Myochroidea, a new genus of corticolous, crustose lichens to accommodate the Lecidea leprosula group. (external link)
• Stefan Ekman; Tor Tønsberg (1996). A new species of Megalaria from the North American west coast, and notes on the generic circumscription. (external link)
• Philipp Resl; Helmut Mayrhofer; Stephen R. Clayden et al. (2016). Morphological, chemical and species delimitation analyses provide new taxonomic insights into two groups of Rinodina. (external link)
• John Sheard; Tor Tønsberg; John Inge Johnsen (2010). Rinodina orculata and R. roboris new to Fennoscandia. (external link)
• Stefan Ekman; Tor Tønsberg (2019). Biatora alnetorum (Ramalinaceae, Lecanorales), a new lichen species from western North America. (external link)
• Tor Tønsberg (1992). Rinodina sheardii, a new lichen species from northwest Europe and northwest North America. (external link)
• Yngvar Gauslaa; J. Anonby; G. Gaarder et al. (1992). Huldrestry, Usnea longissima, en sjelden urskogslav på Vestlandet. (external link)
• A. Elvebakk; Tor Tønsberg (1992). Additions to the lichen flora of Svalbard. (external link)
• Per G. Ihlen; Håkon Holien; Tor Tønsberg (2004). Two new species of Dactylospora (Dactylosporaceae, Lecanorales), with a key to the known species in Scandinavia. (external link)
• Dianne Fahselt; Marianna Krol; Norm Hüner et al. (2000). Pigmentation of Cladonia infected by the lichenicolous fungus Arthrorhaphis aeruginosa. (external link)
• James C. Lendemer; John W. Sheard; Göran Thor et al. (2012). Rinodina chrysidiata, a new species from far eastern Asia and the Appalachian Mountains of North America. (external link)
• Kathryn Beck; Katherine A. Glew; Amanda Hardman et al. (2023). Lichens of Cypress Island, Washington - the seen and the unseen. (external link)
• Tor Tønsberg; John Inge Johnsen (2008). Fuscidea lightfootii new to Fennoscandia. (external link)
• Tor Tønsberg; A. Elvebakk (1993). Cetraria inermis new to Europe. (external link)
• Toby Spribille; Sergio Perez-Ortega; Tor Tønsberg et al. (2010). Lichens and lichenicolous fungi of the Klondike Gold Rush National Historic Park, Alaska, in a global biodiversity context. (external link)
• Tor Tønsberg (1992). Fellhanera new to Norway. (external link)
• Tor Tønsberg; Mikhail P. Zhurbenko (2006). Lepraria gelida, a new species from the Arctic. (external link)
• Tor Tønsberg; Cameron Williams (2006). Arthothelium norvegicum in North America. (external link)
• Gulnara Tagirdzhanova; Paul Saary; Ellen S. Cameron et al. (2024). Microbial occurrence and symbiont detection in a global sample of lichen metagenomes. (external link)
• Anna Guttová; Tor Tønsberg; Anna Lackovicová et al. (2007). The identity of Lecanora carpathica (Lecanoraceae) described from Slovakia. (external link)
• Tor Tønsberg; Z. Palice; Einar Timdal (2021). Marchantiana asserigena, a genus and species new to Norway. (external link)
• Einar Timdal; Tor Tønsberg (2021). Lepraria lobificans (syn. L. santosii) and L. sylvicola new to northern Europe from Norway. (external link)
• John A. Elix; Tor Tønsberg (2006). Notes on the chemistry of Scandinavian Lobaria species. (external link)
• Per Magnus Jørgensen; Tor Tønsberg (2005). Leioderma cherokeense (Pannariaceae, Lecanorales) sp. nov. from the Great Smoky Mountains, North Carolina, U.S.A. (external link)
• Oddvar Olsen; Tor Tønsberg (2016). Thelocarpon superellum ny for Norge [Thelocarpon superellum new to Norway]. (external link)
• J. W. Sheard; Tor Tønsberg (1995). Rinodina stictica, a new corticolous, sorediate lichen species from the Pacific northwest of North America. (external link)
• Irwin M. Brodo; Tor Tønsberg (2019). Opegrapha halophila (Opegraphaceae), a new lichen species from coastal British Columbia, Canada, and Alaska, U.S.A.. (external link)
• T. Spribille; Tor Tønsberg (2007). Lepraria bergensis and L. obtusatica new to Germany. (external link)
• Tor Tønsberg; Per Magnus Jørgensen (1997). On the alleged apothecia of Leproloma. (external link)
• Tor Tønsberg; John Inge Johnsen (2009). Micarea stipitata and Myochroidea leprosula new to Fennoscandia. (external link)
• John W. Sheard; A. K. Ezhkin; I. A. Galanina et al. (2017). The lichen genus Rinodina (Physciaceae, Caliciales) in north-eastern Asia. (external link)
• Per Gerhard Ihlen; Tor Tønsberg (1996). The lichenicolous genus Lettauia in North America. (external link)
• Håkon Holien; Tor Tønsberg (1996). Boreal regnskog i Norge - habitatet for trøndelagselementets lavarter. (external link)
• Ekaphan Kraichak; Robert Lücking; André Aptroot et al. (2015). Hidden diversity in the morphologically variable script lichen (Graphis scripta) complex (Ascomycota, Ostropales, Graphidaceae). (external link)
• Patricia Moya; Isaac Garrido-Benavent; Salvador Chiva et al. (2023). Phylogeography of Ramalina farinacea (Lichenized Fungi, Ascomycota) in the Mediterranean Basin, Europe, and Macaronesia. (external link)
• John A. Elix; Jin Yu; Tor Tønsberg (1991). 4-O-methylhiascic acid and 5-O-Acetyl-4-O-methylhiascic acid, two new lichen tridepsides. (external link)
• Tor Tønsberg (2007). Notes on the Lichen Genus Lepraria in Great Smoky Mountains National Park, southeastern North America: Lepraria lanata and L. salazinica spp. nov. (external link)
• Martina Zahradnikova; Heidi Lie Andersen; Tor Tønsberg (2018). Fuscidea lightfootii and F. pusilla (Fuscideaceae, Umbilicariomycetidae, Ascomycota), two similar but genetically distinct species.. (external link)
• Tor Tønsberg (1992). The sorediate and isidiate, corticolous, crustose lichens in Norway. (external link)
• Per Magnus Jørgensen; Christian Printzen; Tor Tønsberg (2002). Biatora amaurospoda Anzi, a superfluous name for Lecidea pullata (Norman) Th. Fr. (external link)
• Christian Printzen; Tor Tønsberg (2007). Bacidia lobarica (Bacidiaceae, Lecanorales) sp nov., a sorediate lichen from the southeastern USA. (external link)
• Stefan Ekman; Tor Tønsberg (2002). Most species of Lepraria and Leproloma form a monophyletic group closely related to Stereocaulon. (external link)
• I. M. Brodo; Tor Tønsberg (1994). A new species of Micarea with stalked pycnidia from the west coast of North America. (external link)
• L. Cestaro; Tor Tønsberg; L. Muggia (2016). Phylogenetic data and chemical traits characterize a new species in the lichen genus Tephromela. (external link)
• R. Lücking; Tor Tønsberg (2016). Gyalideopsis pusilla (Gomphillaceae, lichenized Ascomycetes), a new species from southeastern North America. (external link)
• Håkon Holien; Tor Tønsberg (2017). Cliostomum piceicola, a new lichen species from oldgrowth coniferous forests in Northern Europe.. (external link)
• R. Santesson; Tor Tønsberg (1994). Arthrorhaphis aeruginosa and A. olivaceae, two new lichenicolous fungi. (external link)
• Tor Tønsberg (1993). Additions to the lichen flora of North America. (external link)
• Tor Tønsberg (1994). Leptogium cochleatum and Rinodina isidioides new to Scandinavia. (external link)
• H. Holien; Tor Tønsberg (1994). The 10th meeting of the Nordic Lichen Society in Nord-Trøndelag, Norway, 1993. (external link)
• J.I. Johnsen; Tor Tønsberg (2016). Fjordkrinslav Hypotrachyna aff. taylorensis, en for Norge og Fennoskandia ny bladlav. (external link)
• Tor Tønsberg (2006). Pertusaria flavocorallina new to Norway. (external link)
• Einar Timdal; Martin Westberg; Reidar Haugan et al. (2020). Integrative taxonomy reveals a new species, Nephroma orvoi, in the N. parile species complex (lichenized Ascomycota). (external link)
• Mireia Giralt; Pieter P.G. Van den Boom; Tor Tønsberg et al. (2010). New data for Rinodina flavosoralifera. (external link)
• Alan M. Fryday; Toby Spribille; Tor Tønsberg (2021). (2794) Proposal to conserve the name Coccotrema against Lepolichen (Ascomycota, Lecanoromycetes, Coccotremataceae). (external link)
• Markus Hauck; Tor Tønsberg; Helmut Mayrhofer et al. (2013). Lichen-forming and lichenicolous fungi new to Kazakhstan. (external link)
• Tor Tønsberg (2006). Notes on some lichens from the Great Smoky Mountains National Park, North Carolina/Tennessee, U.S.A. (external link)
• Bjarke Hopkins; Tor Tønsberg (2006). Notes on Botryolepraria lesdainii in North America. (external link)
• Toby Spribille; P. Resl; Teuvo Ahti et al. (2014). Molecular systematics of the wood-inhabiting, lichen-forming genus Xylographa (Baeomycetales,Ostropomycetidae) with eight new species. (external link)
• John W. Sheard; Bruce McCune; Tor Tønsberg (2014). A new corticolous species of Rinodina (Physciaceae) and two interesting range extensions for species collected from Katmai National Park, Alaska.. (external link)
• Jon T. Klepsland; Tor Tønsberg (2014). Schaereria corticola from the Canary Islands, new to Africa.. (external link)
• G. Thor; Tor Tønsberg; H. Kashiwadani et al. (2005). Lecidea roseotincta new to Asia. (external link)
• John A. Elix; Tor Tønsberg (1999). Notes on the chemistry of some lichens from Norway. (external link)
• Martina Zahradnikova; Heidi Lie Andersen; Tor Tønsberg et al. (2017). Molecular evidence of Apatococcus, including A. fuscideae sp. nov., as photobiont in the genus Fuscidea.. (external link)
• Zdeněk Palice; Christian Printzen; Toby Spribille et al. (2013). Taxonomy of the genus Myrionora, with a second species from South America. (external link)
• Christian Printzen; Tor Tønsberg (2004). New and interesting Biatora-species, mainly from North America. (external link)
• Tor Tønsberg (1995). Additions to the lichen flora of North America IV. Scoliciosporum sarothamni. (external link)
• Tor Tønsberg (1995). Cladonia incrassata new to Norway and the problem of C. anitae in Europe. (external link)
• Bruce McCune; Tor Tønsberg; T. Ahti (2007). Hypogymnia incurvoides new to Scandinavia and the Appalachian Mountains. (external link)
• V. Wirth; Tor Tønsberg; A. Reif et al. (2018). Loxospora cristinae found in Germany.. (external link)
• Tor Tønsberg; Anders Nordin; Leif Tibell (2012). Amandinea lignicola, a new species from the Pacific coast of North America. (external link)
• Per Magnus Jørgensen; Tor Tønsberg (2010). Leptogium insigne, a new species from the Pacific Northwest of North America. (external link)
• Per Magnus Jørgensen; Tor Tønsberg; Katherine A. Glew (2010). Fuscopannaria cheiroloba, a rarely collected lichen species. (external link)
• Ulrik Søchting; Tor Tønsberg (1997). Caloplaca xanthostigmoidea (R@æs.) Zahlbr., a common lichen in cool regions of the Northern Hemisphere. (external link)
• Beata Guzow-Krzemińska; Anna Łubek; Jir̂í Malíĉek et al. (2017). Lecanora stanislai, a new, sterile, usnic acid containing lichen species from Eurasia and North America. (external link)
• Toby Spribille; Curtis R. Björk; Stefan Ekman et al. (2009). Contributions to an epiphytic lichen flora of northwest North America: I. Eight new species from British Columbia inland rain forests. (external link)

Non-fiction monograph

• H. Krog; H. Østhagen; Tor Tønsberg (1994). Lavflora. Norske busk- og bladlav. 2. utg. (external link)
• Håkon Holien; Tor Tønsberg (2008). Norsk lavflora. (external link)
• Rolf Santesson; Roland Moberg; Anders Nordin et al. (2004). Lichen-forming and lichenicolous fungi of Fennoscandia. (external link)
• Geir Gaarder; Håkon Holien; A. Håpnes et al. (1998). Boreal regnskog i Midt-Norge. DN-rapport 1997. (external link)

Academic book chapter

• Christian Printzen; Tor Tønsberg (2004). Japewia. (external link)
• Håkon Holien; Tor Tønsberg (2011). Lavfloraen i Midt-Norges unike regnskoger. (external link)
• B.D. Ryan; Tor Tønsberg; T.H. Nash III et al. (2004). Pyrrhospora. (external link)
• Tor Tønsberg (2004). Lepraria. (external link)
• Tor Tønsberg (2008). Psilolechia. (external link)
• Per Magnus Jørgensen; Tor Tønsberg (2007). Lobariacea. (external link)
• Per Magnus Jørgensen; Tor Tønsberg (2007). Pseudocyphellaria. (external link)
• E. Timdal; H. Bratlie; R. Haugan et al. (2006). Lav. (external link)
• T.H. Nash III; Tor Tønsberg (2004). Gyalideopsis. (external link)
• O.L. Gilbert; O.W. Purvis; L.H. Skjolddal [Skjoldahl] et al. (2009). Fuscidea V. Wirth & Vězda (1972). (external link)
• Håkon Holien; Einar Timdal; Harald Bratli et al. (2006). Lav Lichenes. (external link)
• Tor Tønsberg (2008). Botryolepraria. (external link)
• O.W. Purvis; L.H. Skjolddal [Skjoldahl]; Tor Tønsberg (2009). Ropalospora A. Massal. (1860). (external link)
• O. W. Purvis; L. H. Skjolddal; Tor Tønsberg (1992). Fuscidea. V. Wirth & V#vezda (1972). (external link)
• Tor Tønsberg (2005). Havaas som lichenolog i nasjonal og internasjonal sammenheng. (external link)
• Per Magnus Jørgensen; Tor Tønsberg (2007). Sticta. (external link)
• Tor Tønsberg; Per Magnus Jørgensen (2007). Lobaria. (external link)
• Tor Tønsberg (2004). Normandina. (external link)
• Stefan Ekman; Tor Tønsberg (2004). Scoliciosporum. (external link)
• Tor Tønsberg (2004). Phlyctis. (external link)
• Einar Timdal; Harald Bratli; Reidar Haugan et al. (2010). Lav "Lichenes". (external link)

Popular science book chapter

• Tor Tønsberg (2013). Møteplass for vestlige og østlige lavarter. (external link)
• Tor Tønsberg (2013). Lav i overhengene. (external link)
• Tor Tønsberg (2013). Lav i overhengene. (external link)

Conference poster

• Stefan Ekman; Tor Tønsberg (2002). The phylogenetic position of the genera Lepraria and Leproloma. (external link)
• Martina Zahradnikova; Tor Tønsberg; Heidi Lie Andersen (2014). An evolutionary study of the Fuscideaceae (Lecanoromycetes, Ascomycota). (external link)
• Stefan Ekman; Tor Tønsberg (2004). Chemistry, ecology, and genetic differentiation - an example from the Ramalina farinacea complex. (external link)

Lecture

• Astri Botnen; Solfrid Hjelmtveit; Tor Tønsberg (2011). Vulkanhopping i det vestlige USA. (external link)
• Solfrid Hjelmtveit; Tor Tønsberg (2008). Fra regnskog til ørken i det vestlige U.S.A. (external link)
• Solfrid Hjelmtveit; Tor Tønsberg (2009). Fra regnskog til ørken i det vestlige USA - II. (external link)
• Astri Botnen; Arvid Odland; Tor Tønsberg (2011). Flora og vegetasjon på Rocky Mountains, Colorado, USA. (external link)
• Tor Tønsberg (2013). Glimt fra flora og landskap på vestkysten av Nord-Amerika fra Alaska til Arizona. (external link)
• Tor Tønsberg; Beate Helle; Solfrid Hjelmtveit (2007). Floraen i Great Smoky Mountains National Park, southern Appalachian Mountains, North Carolina og Tennessee. (external link)

Research report

• Arnodd Håpnes; Tor Tønsberg; Håkon Holien et al. (1997). Boreal regnskog i Midt-Norge : registreringer. (external link)
• Øystein Wiig; Vidar Bakken; Jarle Ebeling et al. (2009). Evaluering av samlingsforvaltningssystemet KE EMu for bruk ved universitetsmuseene i Norge. Rapport til styret. (external link)
• Tor Tønsberg (1999). Lichenes isidiosi et sorediosi crustacei exsiccati. Schedae to Fasc. 2 (nos 26-50). (external link)
• Tor Tønsberg (1997). Lichenes isidiosi et sorediosi crustacei exsiccati. Schedae to Fasc. 1 (nos 1-25). (external link)
• Per Magnus Jørgensen; Tor Tønsberg (1992). Truete busk og bladlav i Norge. Rapport til Direktoratet for Naturvern. (external link)

Conference lecture

• Martina Zahradnikova; Tor Tønsberg; Heidi Lie Andersen (2014). An evolutinary study of the Fuscideaceae (Lecanoromycetes, Ascomycota). (external link)
• K.A. Glew; Tor Tønsberg (2000). Lichens from the Pacific northwest of North America associated with a Mediterranean climate. (external link)
• Tor Tønsberg (2015). Lepraria. (external link)
• Tor Tønsberg (2015). Flavoparmelia soredians in Norway—a recently introduced lichen species?. (external link)
• Christian Printzen; Stefan Ekman; Tor Tønsberg (2002). Phylogeography of the widely disjunct lichen Cavernularia hultenii. (external link)
• Tor Tønsberg (1999). Lichen conservation in Norway, with emphasis on Norway's responsibilities to the European and global conservation effort. (external link)
• Martina Zahradnikova; Tor Tønsberg; Heidi Lie Andersen (2014). An evolutionary study of the Fuscideaceae (Lecanoromycetes, Ascomycota). (external link)
• Tor Tønsberg (2015). Lepraria. (external link)
• K.A. Glew; Tor Tønsberg (2000). Lichens from the Pacific northwest of North America associated with a Mediterranean climate. (external link)
• Toby Spribille; Bernard Goffinet; Karen L. Dillman et al. (2014). Forestry, research debt and the decline of oldgrowth-dependent green (Dendrisco-)sticta(Lobariaceae) in British Columbia, Canada. (external link)
• Martina Zahradnikova; Tor Tønsberg; Heidi Lie Andersen (2013). An evolutionary study of the Fuscideaceae (Umbilicariales). (external link)

Popular science article

• Stefan Ekman; Tor Tønsberg (2003). Lepraria + Stereocaulon = sant. (external link)
• Tor Tønsberg (2005). Notes on the lichen flora of the Great Smoky Mountains National Park. (external link)
• Jo Høyer; Bjarte Henry Jordal; Anne Karin Hufthammer et al. (2015). Klimaendringer – spor i museets samlinger. (external link)
• Trond Andersen; Haakon Fossen; Knut Rio et al. (2006). Publikasjonar Bergen Museum 2005. Vitenskaplege og populærvitskaplege artikklar. (external link)
• Per Magnus Jørgensen; Tor Tønsberg (2012). Lav – vekster med flere ansikter. (external link)
• Tor Tønsberg; Stefan Ekman (2003). Lepraria bergensis, en ny lav for vitenskapen fra Bergen. Glimt fra Lepraria-forskningen ved UiB. (external link)
• Bjarte Henry Jordal; Endre Willassen; Anne Karin Hufthammer et al. (2015). Klimaendringer – spor i museets samlinger. (external link)
• Christian Printzen; Tor Tønsberg; Stefan Ekman (2005). Jetsetter oder Säulenheilige. (external link)

Doctoral thesis (PhD)

• Martina Zahradnikova; Tor Tønsberg; Heidi Lie Andersen (2017). Taxonomy and phylogeny of the family Fuscideaceae (Umbilicariales, Ascomycota) with special emphasis on Fuscidea. (external link)
• Martina Zahradnikova; Tor Tønsberg; Heidi Lie Andersen (2017). Taxonomy and phylogeny of the family Fuscideaceae (Umbilicariales, Ascomycota) with special emphasis on Fuscidea. (external link)
• Tor Tønsberg (1992). The sorediate and isidiate, corticolous, crustose lichens in Norway. (external link)

Journal review

• Tor Tønsberg (2008). Review of: Galloway, D.J. 2007. Flora of New Zealand Lichens. Revised second edition. Manaaki Whenua Press. ISBN: 978-0-478-09376-6. (external link)
• Tor Tønsberg (2008). Review of: Hinds, J.W. & Hinds, P.L. 2008. The macrolichens of of New England. Memoirs of The New York Botanical Garden: 96: 1-608. (external link)

Academic monograph

• Dag Olav Øvstedal; Tor Tønsberg; Arve Elvebakk (2009). The lichen flora of Svalbard. (external link)

See a complete overview of publications in NVA.