PATERSON, I W; BOYER, P R; MASSEN, D D. Variations in clutch size and breeding success of Greylag Geese Anser anser in the Uists, Scotland. Wildfowl, [S. l.], p. 18–22, 1990. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154051. Acesso em: 17 dec. 2025.