BioStor
 | On the Larinae or Gulls Howard Saunders (1878) Proceedings of The Zoological Society of London 1878: 155-222 |
 | On some Laridae from the Coasts of Peru and Chili, collected by Capt. Albert H. Markham, H.N., with Remarks on the Geographical Distribution of the Group in the Pacific Howard Saunders (1882) Proceedings of The Zoological Society of London 1882: 520-530 |
 | Notes on the birds of East Africa V G L Van Someren (1922) Novitates Zoologicae 29: 1-246 |