Gonzalez, J.; Düttmann, H.; Wink, M. (2009). «Phylogenetic relationships based on two mitochondrial genes and hybridization patterns in Anatidae». Journal of Zoology. 279: 310–318. doi:10.1111/j.1469-7998.2009.00622.x
Gill, Frank; Donsker, David, eds. (2017). «Screamers, ducks, geese & swans». World Bird List Version 7.3. International Ornithologists' Union. Consultado em 23 de Julho de 2017