JOZKOWICZ, Alicja; WALASZ, Kazimierz. Dynamics and age structure of wintering Mute Swans Cygnus olor in south-eastern Poland. Wildfowl, [S. l.], p. 44–48, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/155012. Acesso em: 16 dec. 2025.