Primary references

• Erichsen, Ann. Mycol. 36: 354 (1938).

• Erichsen, C.F.E. (1938) Neue arktische und subarktische besonders von Dr. E. Hultén und Prof. B. Lynge gesammelte Pertusarien nebst einer Bestimmungstabelle arktischer und subarktischer, über Erde und Moosen wachsender Pertusariaceae. Ann. Mycol. 36: 349–366.   **[Mattick Rec. # 23389] - (Recent Literature on Lichens - Mattick No.)**   (Complete article)

Selected reference

• Dibben, M.J. (1980) The Chemosystematics of the Lichen Genus Pertusaria in North America North of Mexico. - Publications in Biology and Geology No. 5 , Milwaukee Public Museum Press, Milwaukee. 162 pp.   **[RLL List # 108-17 / Rec.# 4306] - (Recent Literature on Lichens)** (Description of Pertusaria borealis: pp. 46-47; black-and-white photo of thallus: p. 139, fig. 63)

Links

• North American Lichen Checklist, Version (#19) 23 March 2014 (list P)

• Pertusaria borealis in United States Department of Agriculture, Natural Resources Conservation Service, PLANTS Database.

• Pertusaria borealis in Index Fungorum.

• Pertusaria borealis in MycoBank.