WEST, John; BLACK, J M; NUGENT, M J; OWEN, Myrfyn. Second-brooding in semi-captive Barnacle Geese. Wildfowl, [S. l.], p. 51–54, 1986. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154782. Acesso em: 16 dec. 2025.