STENSCHKE, Nico; DEGEN, Axel; SCHONERT, Axel. Moult migration of Northwest Mainland European Whooper Swans Cygnus cygnus. Wildfowl, [S. l.], p. 211–228, 2019. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154482. Acesso em: 16 dec. 2025.