Template:Lydekker, 1915
- Lydekker, R. 1915. Catalogue of the ungulate mammals in the British Museum (Natural History). Vol. IV. Artiodactyla, families Cervidæ (deer), Tragulidæ (chevrotains), Camelidæ (camels and llamas), Suidæ (pigs and peccaries), and Hippopotamidæ (hippopotamuses). Printed by order of the Trustees of the British Museum, British Museum Catalogue. 438 pp. BHL