BUXTON, N. The feeding behaviour and food of the Shelduck on the Ythan Estuary, Aberdeenshire. Wildfowl, [S. l.], v. 27, p. 160–160, 1976. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154318. Acesso em: 19 apr. 2026.