JACOBSEN, Odd W; UGELVIK, Morten. A case of polygyny in the Eurasian Wigeon Anas penelope. Wildfowl, [S. l.], p. 72–75, 1995. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154668. Acesso em: 13 feb. 2026.