Nilsson, Leif. “Changes in Local Distribution and Numbers of Staging and Wintering Bean Geese Anser Fabalis in Scania, South Sweden 1977/1978–2016/2017”. Ornis Svecica 27, no. 2–4 (October 1, 2017): 110–120. Accessed August 17, 2022. https://journals.lub.lu.se/os/article/view/19564.