Database
Popular scientific lecture
Academic article
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Nordin, Anders; Botnen, Astri; Santesson, Rolf
(2007). Gyalidea polyspora formally described from Norway and Sweden. (external link)
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Moe, Bjørn; Botnen, Astri
(2000). Epiphytic vegetation on pollarded trunks of Fraxinus excelsior in four different habitats at Grinde, Leikanger, western Norway. (external link)
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Botnen, Astri
(1997). Collema callopismum new to Norway. (external link)
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Moe, Bjørn; Botnen, Astri
(1997). A quantitative study of the epiphytic vegetation on pollarded trunks of Fraxinus excelsior at Havrå, Osterøy, Western Norway. (external link)
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Botnen, Astri
(1993). Ramonia, a lichen genus new to Scandinavia. (external link)
Popular scientific article
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