BOYD, W Sean; COOKE, Fred. Changes in the wintering distribution of Wrangel Island Snow Geese Anser c. caerulescens. Wildfowl, [S. l.], p. 59–66, 2000. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153917. Acesso em: 17 dec. 2025.