BioStor
 | April 21, 1863 E W H Holdsworth (1863) Proceedings of The Zoological Society of London 1863: 102-181 |
 | List of Birds recently collected by Dr. Kirk in Eastern Africa (1881) Proceedings of The Zoological Society 1881: 561-602 |
 | June 16, 1885 (1885) Proceedings of The Zoological Society of London 1885: 609-613 |
 | First report on additions to the Lizards in the British Museum (Nat. Hist.) G A Boulenger (1890) Proc. zool. Soc., London 1890: 77-86 |
 | The evolution of guinea-fowl (Galliformes, Phasianidae, Numidinae) taxonomy, phylogeny, speciation and biogeography T M Crowe (1978) Annals of The South African Museum 76: 43-136 |