Template:Lücking et al., 2008a
- Lücking, R., Chaves, J.L., Sipman, H.J.M., Umaña, L. & Aptroot, A. 2008. A First Assessment of the Ticolichen Biodiversity Inventory in Costa Rica: The Genus Graphis, with Notes on the Genus Hemithecium (Ascomycota: Ostropales: Graphidaceae). Fieldiana: Botany New Series 46: 1–131. DOI: 10.3158/0015-0746(2008)46[1:AFAOTT]2.0.CO;2 . BHL