1. Anderson EF (1969) The biogeography, ecology, and taxonomy of Lophophora (Cactaceae). Brittonia 21:299–310
2. Anderson EF (1980) Peyote, the divine cactus. The University of Arizona Press, Tucson, Arizona, USA
3. Anderson EF (2001) The cactus family. Timber Press, Portland, OR, USA
4. Barthlott W, Hunt D (2000) Seed diversity in the Cactaceae. David Hunt, Milborne Port, UK
5. Bátis AI, Rojas-Aréchiga M (2002) El peyote y otros cactos alucinógenos de México. Biodiversitas 40:12–17