Sraml, M.; Christidis, L.; Easteal, S.; Horn, P.; Collet, C. (1996). «Molecular Relationships Within Australasian Waterfowl (Anseriformes)». Australian Journal of Zoology. 44 (1): 47–58. doi:10.1071/ZO9960047
Gill; Donsker, David, eds. (2017). «Screamers, ducks, geese & swans». World Bird List Version 7.3. International Ornithologists' Union. Consultado em 7 de novembro de 2017