KNAPIK, Randall T.; LUUKKONEN, David R.; WINTERSTEIN, Scott R. Density dependence in productivity of a North American Mute Swan Cygnus olor population. Wildfowl, [S. l.], p. 178–196, 2019. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154484. Acesso em: 16 dec. 2025.