HILLGARTH, Nigella; KEAR, Janet; HORKY, Katherine. Mortality of the northern geese in captivity. Wildfowl, [S. l.], v. 34, p. 153–162, 1983. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154247. Acesso em: 19 apr. 2026.