Laubek B. Habitat use by Whooper Swans Cygnus cygnus and Bewick’s Swans Cygnus columbianus bewickii wintering in Denmark: increasing agricultural conflicts. Wildfowl [Internet]. 1995 Jan. 1 [cited 2025 Dec. 17];:8-15. Available from: https://tidsskrift.dk/Wildfowl/article/view/154673