HENNY, Charles J; CARTER, Bette J; CARTER, Bette J. A review of Bufflehead sex and age criteria with notes on weights. Wildfowl, [S. l.], p. 117–122, 1981. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154186. Acesso em: 18 dec. 2025.