JONSSON, J E; GARDARSSON, A. Pair formation in relation to climate: Mallard, Eurasian Wigeon and Eurasian Teal wintering in Iceland. Wildfowl, [S. l.], p. 55–68, 2001. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153966. Acesso em: 17 dec. 2025.