Sawa, Y., Tamura, C., Ikeuchi, T., Fujii, K., Ishioroshi, A., Shimada, T., … Ward, D. (2020). Migration routes and population status of the Brent Goose Branta bernicla nigricans wintering in East Asia. Wildfowl, 244–266. Retrieved from https://tidsskrift.dk/Wildfowl/article/view/156282