KALEJTA-SUMMERS, Bozena; BUTTERFIELD, David. Numbers and distribution of wintering divers, grebes and seaducks in the Moray Firth, Scotland, 1998/99-2003/04. Wildfowl, [S. l.], p. 113–128, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153967. Acesso em: 17 dec. 2025.