BioStor
 | Checklist of Palaearctic and Indian mammals 1758 to 1946 J E Ellerman and T C S Morrison-Scott (1951) |
 | Mammals of the Anglo-Egyptian Sudan Henry W Setzer (1956) Proceedings of the United States National Museum 106(3377): 447-587 |
 | The co-evolution of social behavior and cranial morphology in sheep and goats (Bovidae, Caprini) W M Schaffer and C A Reed (1972) Fieldiana (Zool.) 61: 1-88 |
 | Recent records of mammals (other than bats) from Ethiopia Gordon Barclay Corbet and Derek William Yalden (1972) Bulletin of the British Museum (Natural History). Zoology 22(8): 211-252 |