WLODARCZYK, R; WOJCIECHOWSKI, Z. The breeding ecology of the Mute Swan Cygnus olor in central Poland. Wildfowl, [S. l.], p. 157–168, 2001. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153957. Acesso em: 13 feb. 2026.