KALEJTA-SUMMERS, Bozena. Long-term changes in numbers and distribution of wintering ducks and swans in the Moray Firth, Scotland, 1985-2002. Wildfowl, [S. l.], p. 94–112, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153981. Acesso em: 17 dec. 2025.