POLLARD, D F W; WALTERS-DAVIES, P. A preliminary study of the feeding of the Greenland white-fronted goose Anser albifrons flavirostris in Cardiganshire. Wildfowl, [S. l.], p. 108–116, 1968. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154503. Acesso em: 18 dec. 2025.