SMIDDY, Patrick; O’HALLORAN, John. The breeding biology of Mute Swans Cygnus olor in southeast Cork, Ireland. Wildfowl, [S. l.], p. 12–16, 1991. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154079. Acesso em: 17 dec. 2025.