BioStor
 | Notes on birds collected by Doctor W. L. Abbott in central Asia Harry C Oberholser (1900) Proceedings of The United States National Museum 22: 205-228 |
 | Contribution a la faune ornithologique de la region des lacs de l'Afrique Central (1918) Revue Zoologique Africaine 5: 209-297 |
 | Type-specimens of birds in the British Museum (Natural History). Vol. 1 Non-passerines Rachel L M Warren (1966) |