Laubek B, Clausen P, Nilsson L, Wahl J, Wieloch M, Meissner W, et al. Whooper Swan Cygnus cygnus January population censuses for Northwest Mainland Europe, 1995–2015. Wildfowl [Internet]. 2019 Nov. 27 [cited 2025 Dec. 16];:103-22. Available from: https://tidsskrift.dk/Wildfowl/article/view/154490