MITCHELL, Carl; OWEN, Myrfyn. Wigeon Anas penelope movements and turnover: a report on the first two seasons of a Wildfowl and Wetlands Trust Project. Wildfowl, [S. l.], v. 41, p. 145–149, 1990. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154028. Acesso em: 15 apr. 2026.