Nilsson, Leif, Hakon Persson, and Berend Voslamber. “Factors Affecting Survival of Young Greylag Geese Anser Anser and Their Recruitment into the Breeding Population”. Wildfowl (January 1, 1997): 72–87. Accessed February 13, 2026. https://tidsskrift.dk/Wildfowl/article/view/154102.