1. Azzaroli A., 1966.Pleistocene and Living Horses of the Old World. Palaeontographia Italica, 61: 1–15, Pis. 1–46.
2. Azzaroli A., 1982.On Villafranchian Palaearctic Equids and their allies. Palaeontographia Italica, 72: 74–97, Pls. 8–11.
3. Bourdelle E., 1955.Ordre des Périssodactyles. In:P. P. Grassé (ed.),Traité de Zoologie. Tome 17, fascicule 1, Paris: 1002–1126.
4. Churcher C. S., 1982.Grévy’s - the other zebra. Swara, 5, No. 2: 12–18.
5. Churcher C. S., 1986.The extinct Cape Zebra. Sagittarius, 1, No. 4: 4–5.