(1)
O’Connell, M. M.; Keating, U.; Mcelligott, D.; O’Reilly, P.; O’Callaghan, J.; O’Halloran, J. An Investigation of a Novel Anomalous Pink Feather Colouration in the Mute Swan Cygnus Olor in Britain and Ireland. Wildfowl 2013, 152-165.