Template:Calvelo et al., 2005
- Calvelo, S., Stocker-Wörgötter, E., Liberatore, S. & Elix, J.A. 2005. Protousnea (Parmeliaceae, Ascomycota), a Genus Endemic to Southern South America. The Bryologist 108(1): 1–15. RLL List # 198 / Rec.# 26746 – Recent Literature on Lichens DOI: 10.1639/0007-2745(2005)108[1:PPAAGE]2.0.CO;2 JSTOR