MATTHEWS, G V T; EYGENRAAM, J A; HOFFMANN, L. Initial direction tendencies in the European Green-winged Teal. Wildfowl, [S. l.], v. 14, p. 4, 1963. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/155832. Acesso em: 19 apr. 2026.