Groves, C. P. (1981). Systematic relationships in the Bovini (Artiodactyla, Bovidae). Zeitschrift für Zoologische Systematik und Evolutionsforschung, 4:264–278. citat a Don E. Wilson i DeeAnn M. Reeder (editors). 2005. Mammal Species of the World. A Taxonomic and Geographic Reference (3a edició), Johns Hopkins University Press: "Bison". (online editionArxivat 2011-09-22 a Wayback Machine.)
Groves, C. P. (1981). Systematic relationships in the Bovini (Artiodactyla, Bovidae). Zeitschrift für Zoologische Systematik und Evolutionsforschung, 4:264–278. citat a Don E. Wilson i DeeAnn M. Reeder (editors). 2005. Mammal Species of the World. A Taxonomic and Geographic Reference (3a edició), Johns Hopkins University Press: "Bison". (online editionArxivat 2011-09-22 a Wayback Machine.)