ZICUS, Michael C; RAVE, David P; FIEBERG, John R; GIUDICE, John H; WRIGHT, Robert G. Distribution and abundance of Minnesota-breeding Ring-necked Ducks Aythya collaris. Wildfowl, [S. l.], p. 31–45, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153907. Acesso em: 16 dec. 2025.