Bell, M V, A V Newton, and S F Newton. “Roost Selection by Pink-Footed Anser Brachyrhynchus and Greylag A. Anser Geese in East Central Scotland”. Wildfowl (January 1, 1997): 40–63. Accessed December 16, 2025. https://tidsskrift.dk/Wildfowl/article/view/154105.