NILSSON, Leif; PERSSON, Hakon. Site tenacity and turnover rate of staging and wintering Bean Geese Anser fabalis in southern Sweden. Wildfowl, [S. l.], p. 53–59, 1991. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154075. Acesso em: 17 dec. 2025.