CZAPULAK, Andrzej; WIELOCH, Maria. The breeding ecology of the Mute Swan Cygnus olor in Poland - preliminary report. Wildfowl, [S. l.], p. 161–166, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154992. Acesso em: 16 dec. 2025.