BioStor
 | XVIII.—Attempts at a natural arrangement of birds Alfred R Wallace (1856) Annals And Magazine of Natural History 18: 193-216 |
 | April 11, 1867 J E Gray (1867) Proceedings of The Zoological Society of London 1867: 391-472 |
 | April 20, 1875 Osbert Sabin (1875) Proceedings of The Zoological Society of London 1875: 316-348 |
 | On Birds from the Congo and South-Western Africa (1888) Notes From The Leyden Museum 10: 209-244 |
 | May 21, 1895. Lt.-Col. H. H. GODWIN-AUSTEN, F.R.S., Vice-President in the Chair (1895) Proceedings of The Zoological Society of London 1895: 400-520 |