HALL, Colette; CROWE, Olivia; MCELWAINE, Graham; EINARSSON, Ólafur; CALBRADE, Neil; REES, Eileen C. Population size and breeding success of the Icelandic Whooper Swan Cygnus cygnus: results of the 2015 international census. Wildfowl, [S. l.], p. 75–97, 2016. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153683. Acesso em: 13 feb. 2026.