OWEN, Myrfyn; KERBES, R H. On the autumn food of Barnacle Geese at Caerlaverock National Nature Reserve. Wildfowl, [S. l.], n. 22, p. 114–119, 1971. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/155402. Acesso em: 18 dec. 2025.