VAZ-FERREIRA, R; RILLA, F. Black-necked Swan Cygnus melancoryphus and Coscoroba Swan Coscoroba coscoroba in a wetland in Uruguay. Wildfowl, [S. l.], p. 272–277, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154960. Acesso em: 17 dec. 2025.