BROWN, Martin J; LINTON, Emma; REES, Eileen C. Causes of mortality among wild swans in Britain. Wildfowl, [S. l.], v. 43, p. 70–79, 1992. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/155364. Acesso em: 15 apr. 2026.