SCHNEIDER-JACOBY, Martin; FRENZEL, Peter; JACOBY, Harald; KNöTZSCH, Gerhard; KOLB, Karl-Heinz. The impact of hunting on a protected species, the Whooper Swan Cygnus cygnus at Lake Constance. Wildfowl, [S. l.], p. 378–382, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154939. Acesso em: 17 dec. 2025.