Cocke, J., Alton, S. K. and Black, J. M. (2016) “Observations of Aleutian Cackling Geese Branta hutchinsii leucopareia breeding on Buldir Island, Alaska: forty-seven years after discovery of a remnant population”, Wildfowl, pp. 112–125. Available at: https://tidsskrift.dk/Wildfowl/article/view/153672 (Accessed: 16 December 2025).