1. The avifauna of Biak Island, Papua, Indonesia with comments on status, conservation, natural history and taxonomy
2. Rothschild, W., E. Stresemann, and K. Paludan (1932). Ornithologische Ergebnisse de Expedition Stein 1931-32. Novitates Zoologicae 38:127–247.
3. Hartert, E. (1924). Types of birds in the Tring Museum (Continuation). Novitates Zoologicae 31:112–134.
4. Mathews, G. M. (1913). New species and subspecies of Australian birds. The Austral Avian Record 2(4):73-79
5. Wallace, A. R. (1864). On the parrots of the Malayan Region, with remarks on their habits, distribution, and affinities, and the descriptions of two new species. Proceedings of the Zoological Society of London 1864:272–295.