OWEN, Myrfyn; NUGENT, Martin; DAVIES, Nicola. Discrimination between grass species and nitrogen-fertilized vegetation by young Barnacle Geese. Wildfowl, [S. l.], p. 6, 1977. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154363. Acesso em: 13 feb. 2026.