MAJEWSKI, Przemyslaw. Breeding ecology of the Mallard on a flooded area of the Warta river mouth, Poland. Wildfowl, [S. l.], v. 37, p. 88–103, 1986. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154783. Acesso em: 4 apr. 2026.