BOIKO, Dmitrijs; WIKELSKI, Martin. Moulting sites of Latvian Whooper Swan Cygnus cygnus cygnets fitted with GPS-GSM transmitters. Wildfowl, [S. l.], p. 229–242, 2019. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154483. Acesso em: 16 dec. 2025.