BioStor
 | Another small Contribution to African Ornithology (1900) Novitates Zoologicae 7: 25-53 |
 | On the Birds collected during the Mackinder Expedition to Mount Kenya R Bowdler Sharpe, H J Mackinder et al. (1900) Proceedings of The Zoological Society of London 1900: 596-609 |
 | Vögel von Schoa und Süd-Äthiopien Oscar Neumann (1905) Journal für Ornithologie 53(1): 184-243 |
 | Notes on the birds of East Africa V G L Van Someren (1922) Novitates Zoologicae 29: 1-246 |