GRANT, Todd A; HENSON, Paul; COOPER, James A. Feeding behaviour of Trumpeter Swans Cygnus buccinator. Wildfowl, [S. l.], p. 6–15, 1997. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154106. Acesso em: 16 dec. 2025.