Template:Erichsen, 1936a

• Erichsen, C.F.E. 1936. Beiträge zur Kenntnis der Flechtengattung Pertusaria. Repertorium Specierum Novarum Regni Vegetabilis 41(1–13): 77–101. DOI: 10.1002/fedr.19360410105 . ResearchGate . Biblioteca Digital  
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  • Mattick Rec.# 23386 – Recent Literature on Lichens