Lydekker, R. (1914). Catalogue of the Ungulate Mammals in the British Museum (Natural History). Vol. III, Artiodactyla, families Bovidae, subfamilies Aepycerotinae tot Tragelaphinae (Pala, Saiga, Gazelles, Oryx Group, Bushbucks, Kudus, Elands, Etc., Antilocapridae (Prongbuck, and Giraffidae (Giraffes and Okapi). Wiliam Clowes and Sons Limited, London. Available online at: https://archive.org/details/catalogueofungul03brit.
