ELY, C R; TAKEKAWA, J Y; WEGE, M L. Distribution, abundance and age ratios of Wrangel Island Lesser Snow Geese Answer caerulescens during autumn migration on the Yukon-Kuskokwim Delta, Alaska. Wildfowl, [S. l.], p. 24–32, 1993. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154697. Acesso em: 17 dec. 2025.