Template:Demaio & al., 2011
- Demaio, P.H., Barfuss, M.H.J., Kiesling, R. Till, W. & Chiapella, J.O 2011. Molecular phylogeny of Gymnocalycium (Cactaceae): Assessment of alternative infrageneric systems, a new subgenus, and trends in the evolution of the genus. American Journal of Botany 98(11): 1841–1854. DOI: 10.3732/ajb.1100054
