DITTAMI, John; THOMFORDE, Charles; KENNEDY, Scott. Preliminary observations on the nesting of Barnacle Geese in Spitsbergen. Wildfowl, [S. l.], p. 7, 1977. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154359. Acesso em: 18 dec. 2025.