NORRISS, D W; WILSON, H J. Disturbance and flock size changes in Greenland Whitefronted Geese wintering in Ireland. Wildfowl, [S. l.], p. 63–70, 1988. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154734. Acesso em: 17 dec. 2025.