Template:Sipman, 1980

• Sipman, H.J.M. 1980. Studies on Colombian Cryptogams. X. The genus Everniastrum Hale and related taxa (Lichenes). Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen, Ser. C, 83(4): 333–354. RLL (PDF)  
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  • RLL Suppl. Rec.# 570 – Recent Literature on Lichens