Template:Wirtz et al., 2006
- Wirtz, N., Printzen, C., Sancho, L.G. & Lumbsch, H.T. 2006. The phylogeny and classification of Neuropogon and Usnea (Parmeliaceae, Ascomycota) revisited. Taxon 55(2): 367–376. RLL List # 204 / Rec.# 29358 – Recent Literature on Lichens DOI: 10.2307/25065584