Fox, Anthony D, Bart S Ebbinge, Carl Mitchell, Thomas Heinicke, Tomas Aarvak, Kendrew Colhoun, Preben Clausen, et al. “Current Estimates of Goose Population Sizes in Western Europe, a Gap Analysis and an Assessment of Trends”. Ornis Svecica 20, no. 3–4 (October 1, 2010): 115–127. Accessed October 15, 2024. https://journals.lub.lu.se/os/article/view/19922.