Matthee, C. A.; Robinson, T. J. (1999). »Cytochrome b phylogeny of the family Bovidae: Resolution within the Alcelaphini, Antilopini, Neotragini, and Tragelaphini«. Molecular Phylogenetics and Evolution. 12 (1): 31–46. doi:10.1006/mpev.1998.0573. PMID10222159.
Matthee, C. A.; Robinson, T. J. (1999). »Cytochrome b phylogeny of the family Bovidae: Resolution within the Alcelaphini, Antilopini, Neotragini, and Tragelaphini«. Molecular Phylogenetics and Evolution. 12 (1): 31–46. doi:10.1006/mpev.1998.0573. PMID10222159.