BOIKO, Dmitrijs; KAMP-PERSSON, Hakon; MORKÅ­NAS, Julius. Breeding Whooper Swans Cygnus cygnus in the Baltic states, 1973–2013: result of a 207 re-colonisation. Wildfowl, [S. l.], p. 207–216, 2014. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153626. Acesso em: 16 dec. 2025.