Academic article

• John A. Elix; Dag Olav Øvstedal; Niek J.M. Gremmen (2011). A new species of Cresponea (Roccellaceae, Ascomycota) from Gough Island. (external link)
• Dag Olav Øvstedal; Alan M. Fryday; R.I. Lewis Smith (2019). Lecanora muscigena (Lichenized Ascomycota, Lecanorales), a new lichen species in the Lecanora fuscescens group from South Georgia. (external link)
• Dag Olav Øvstedal; Niek J.M. Gremmen (2006). Lichens of sub-Antarctic Heard Island. (external link)
• Dag Olav Øvstedal; Ronald Ian Lewis Smith (2004). Additions and corrections to the Lichens of Antarctica and South Georgia. (external link)
• Torgils Fossen; Bjarte Holmelid; Dag Olav Øvstedal (2019). Bumblebee death associated with Tilia x europaea L. (external link)
• Damien Ertz; André A. Ptroot; Bart Van de Vijver et al. (2014). Lichens from the utsteinen nunatak (Sør Rondane Mountains, Antarctica), with the description of one new species and the establishment of permanent plots. (external link)
• Dag Olav Øvstedal; Olav Mjaavatten (1992). A multivariate comparison between three NW European populations of Artemisia norvegica (Asteraceae) by means of chemometric and morphometric data. (external link)
• Dag Olav Øvstedal; R. I. Lewis Smith (1992). Pertusaria signyae (Lichenes), a new species from the Antarctic. (external link)
• A. Vezda; Dag Olav Øvstedal; R. I. Lewis Smith (1992). Eine neue Gyalecta-Art aus der Antarctis. G. pezizoides sp. n. (lichenisierte Fungi, Gyalectaceae). (external link)
• U. Søchting; Dag Olav Øvstedal (1992). Contributions to the Caloplaca flora of the western Antarctic region. (external link)
• Raimundo G. de Oliveira-Júnior; Ana P. de Oliveira; Amanda L. Guimarães et al. (2014). The first flavonoid isolated from Bromelia laciniosa (Bromeliaceae). (external link)
• Xuan Hong Thy Nguyen; Ole-Johan Juvik; Dag Olav Øvstedal et al. (2014). 6-Carboxydihydroresveratrol 3-O-β-glucopyranoside - A novel natural product from the Cretaceous relict Metasequoia glyptostroboides. (external link)
• Dag Olav Øvstedal; John A. Elix (2007). Three new lichen species from the French Antilles. (external link)
• R. I. L. Smith; Dag Olav Øvstedal (1994). Solorina spongiosa in Antarctica, an extremely disjunct bipolar lichen. (external link)
• H. Thorsten Lumbsch; Teuvo Ahti; Susanne Altermann et al. (2011). One hundred new species of lichenized fungi: a signature of undiscovered global diversity. (external link)
• L. Tollsten; Dag Olav Øvstedal (1994). Differantiation in floral scent chemistry among populations of Conopodium majus (Apiaceae). (external link)
• Dag Olav Øvstedal (1993). Tre nordnorske lignosar: tromsøbjørk, kola-or og sibirgran. (external link)
• Dag Olav Øvstedal; R. I. Smith; [Mangler fornavn] Lewis (1993). A new Pannaria species from the Antarctic. (external link)
• Dag Olav Øvstedal; Ronald I. Lewis Smith (2011). Four additional lichens from the Antarctic and South Georgia, including a new Leciophysma species. (external link)
• Dag Olav Øvstedal; Niek J.M. Gremmen (2001). The lichens of Marion and Prince Edward Islands. (external link)
• Torgils Fossen; Rune Slimestad; Dag Olav Øvstedal et al. (2000). Covalent anthocyanin-flavonol complexes from flowers of chive, Allium schoenoprasum. (external link)
• Dag Olav Øvstedal; Inger Margrethe Haaland (1996). On the origins of Carex x liidi (Cyperaceae) from Spitzbergen. (external link)
• Dag Olav Øvstedal; Inger Margrethe Haaland (1996). On the origins of Carex x liidi (Cyperaceae) from Spitzbergen. (external link)
• Dag Olav Øvstedal; Torgils Fossen; Øyvind Moksheim Andersen et al. (1996). Characteristic Anthocyanin Pattern from Onions and other Allium spp. (external link)
• Dag Olav Øvstedal; John A. Elix; Ronald I. Lewis Smith (1996). A new species of Parmella (Lichenized Ascomycotina) from the Antarctic. (external link)
• Tor Tønsberg; J.I. Johnsen; Dag Olav Øvstedal (2005). Leptogium britannicum refound in Norway. (external link)
• Dag Olav Øvstedal; Louise Lindblom; Kerry Knudsen et al. (2018). A new species of Acarospora (Acarosporaceae, Acarosporales, lichenized Ascomycota) from the Falkland Islands (Islas Malvinas). (external link)
• Dag Olav Øvstedal; Ronald Ian Lewis Smith (2009). Further additions to the lichen flora of Antarctica and South Georgia. (external link)
• Dag Olav Øvstedal; Einar Heegaard (2001). Biodiversity and vegetation dynamics in the coastal heathlands of western Norway. (external link)
• Kjell Torskangerpoll; Rikke Nørbæk; Egil Nodland et al. (2005). Anthocyanin content of Tulipa species and cultivars and its impact on tepal colours. (external link)
• Dag Olav Øvstedal; Torgils Fossen; Øyvind Moksheim Andersen et al. (1996). Characteristic Anthocyanin Pattern from Onions and other Allium spp. (external link)
• Dag Olav Øvstedal (2018). Maritime species of the genus Verrucaria in Kerguelia. (external link)
• Tor Tønsberg; Dag Olav Øvstedal (1995). Cladonia peziziformis new to Norway from a burnt Calluna heath. (external link)
• Dag Olav Øvstedal (2011). Blankburknekomplekset (Asplenium adiantum-nigrum s.lat) på Vestlandet. (external link)
• Dag Olav Øvstedal; Louise Lindblom (2023). Arrhenia schistidicola (Hygrophoraceae, Agaricales) – a new species on the moss Schistidium crassipilum from western Norway. (external link)
• Dag Olav Øvstedal; H. J. M. Gremmen (1995). Two further biopolar lichens. (external link)
• Torgils Fossen; Dag Olav Øvstedal (2003). Anthocyanins from flowers of the orchids Dracula chimaera and D. cordobae. (external link)
• Torgils Fossen; Dag Olav Øvstedal; Rune Slimestad et al. (2003). Anthocyanins from a Norwegian potato cultivar. (external link)
• Alan M. Fryday; Dag Olav Øvstedal (2012). New species, combinations and records of lichenized fungi from the Falkland Islands (Islas Malvinas). (external link)
• J.A. Elix; Dag Olav Øvstedal; N.J.M. Gremmen (2005). A new Lepraria species from Gough Island, South Atlantic Ocean. (external link)
• Dag Olav Øvstedal (2005). Løvetenner i Hordaland.I-Taraxacum sect Erythrosperma-sandløvetenner. (external link)
• Dag Olav Øvstedal; J.A. Elix; P.A. Broady (2020). A new sorediate species of Amandinea (Caliciaceae)Ascomycota) from Antarctica. (external link)
• Dag Olav Øvstedal; Carlos Schaefer (2013). A new lichen species from the Heritage Range, Ellsworth Mountains, Antarctica. (external link)
• Ryszard Ochyra; Dag Olav Øvstedal; Paul A. Broady (2022). The distribution of lichens and mosses at Edward VII Peninsula, Marie Byrd Land, Antarctica. (external link)
• Fabian A. Seymour; Peter D. Crittenden; Nora Wirtz et al. (2007). Phylogenetic and morphological analysis of Antarctic lichenforming Usnea species in the group neuropogon. (external link)

Popular science article

• Dag Olav Øvstedal (2011). Evjestorr, Carex oederi var. bergrothii, ein sjeldsynt og raudlista storr på Vestlandet. (external link)
• Dag Olav Øvstedal (2011). Raggtelgkomplekset (Dryopteris affinis s.lat.) på Vestlandet. (external link)
• Dag Olav Øvstedal (1997). Om fruktkarakterar hos tromsøpalme og kjempebjønnkjeks. (external link)
• Dag Olav Øvstedal (2006). Løvetenner i Hordaland II - seksjonene Borea, Borealia, Borigena, Celtica, Hamata, Macrodonta, Maevosa, Spectabilia og Taraxacum. (external link)
• Bjørn Moe; Reidun Myking; Dag Olav Øvstedal (2006). Månadsblomen 2005. (external link)
• Dag Olav Øvstedal (1999). Rhododendron catawbiense i Bergen. (external link)
• Dag Olav Øvstedal (2008). Den eldste naturaliserte påskelilja på Vestlandet. (external link)
• Dag Olav Øvstedal (2008). Fjelltjæreblomen i Almklovdalen - ein ny varietet som veks på olivin. (external link)

Conference abstract

• Dag Olav Øvstedal; John A. Elix (2011). Echinoplaca pernambucensis Øvstedal & Elix sp.nov. (external link)

Media interview

• Dag Olav Øvstedal; Bjørn Moe (2007). Nye farger i Arboretet: "Ugress" til pynt og Nye hager kommer til sommeren. (external link)

Working paper

• Dag Olav Øvstedal (1993). Vossakvann-prosjektet ved Botanisk Hage, Universitetet i Bergen. (external link)

Academic book chapter

• Knut Fægri; Per Magnus Jørgensen; Peder Ole Karlsen et al. (2000). Den botaniske hage - Muséhagen på Nygårdshøyden - et hundreårsjubileum. (external link)

Textbook

• Dagfinn Moe; Per Harald Salvesen; Dag Olav Øvstedal (2000). Historiske hager. (Bergen Museums skrifter nr. 5). (external link)
• Dagfinn Moe; Per Harald Salvesen; Dag Olav Øvstedal (2000). Historiske hager. (external link)
• Dagfinn Moe; Per Harald Salvesen; Dag Olav Øvstedal (2000). Historiske hager. (external link)
• Dagfinn Moe; Per Harald Salvesen; Dag Olav Øvstedal (2000). Historiske hager. (external link)
• Dagfinn Moe; Per Harald Salvesen; Dag Olav Øvstedal (2000). Historiske hager. (external link)
• Dagfinn Moe; Per Harald Salvesen; Dag Olav Øvstedal (2000). Historiske hager. (external link)

Non-fiction monograph

• Dag Olav Øvstedal; Ronald Ian Lewis Smith (2001). Lichensof Antarctica and South Georgia.A guide to their identification and ecology. xii, 411 s. (external link)

Academic monograph

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

Conference poster

• Xuan Hong Thy Nguyen; Ole-Johan Juvik; Dag Olav Øvstedal et al. (2013). A novel natural product from the dinosaur-age tree Metasequoia glyptostroboides. (external link)
• Torgils Fossen; Rune Slimestad; Dag Olav Øvstedal et al. (2000). Anthocyanins from grasses. (external link)

See a complete overview of publications in NVA.