LOKEMOEN, John T; JOHNSON, Douglas H; SHARP, David E. Weights of wild Mallard Anas platyrhynchos, Gadwall A. strepera, and Blue-winged Teal A. discors during the breeding season. Wildfowl, [S. l.], v. 41, p. 122–132, 1990. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154049. Acesso em: 15 apr. 2026.