NEWTH, Julia; COLHOUN, Kendrew; EINARSSON, Olafur; MCELWAINE, Graham; THORSTENSEN, Sverrir; HESKETH, Richard; PETERSEN, Aevar; WELLS, Jim; REES, Eileen. Winter distribution of Whooper Swans Cygnus cygnus ringed in four geographically discrete regions in Iceland between 1988 and 2006: an update. Wildfowl, [S. l.], p. 98–119, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153870. Acesso em: 13 feb. 2026.