Heinichen, I.G. 1970. Karyological studies on Southern African Perissodactyla. Koedoe 13: 51-108, pls. 1-15, fig. 1, tables 1-20.
Heinichen, I.G. 1969. Karyological studies on Southern African Perissodactyla. Journal of the South African veterinary medicine Association 40 (1): 99-100, figs. 1-2.
Heinichen, I.G. 1967. Karyotype of Ceratotherium simum simum and Equus zebra zebra: a preliminary note. Journal of the South African veterinary medicine Association 38 (3): 247-248, fig. 1.






