ZAYNAGUTDINOVA, Elmira M.; KOUZOV, Sergey A.; BATOVA, Polina R.; MIKHAILOV, Yuriy M.; KRAVCHUK, Anna V. Spring migration stopovers of swans Cygnus sp. in the Russian part of the Gulf of Finland. Wildfowl, [S. l.], p. 123–138, 2019. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154485. Acesso em: 16 dec. 2025.