Migration routes and population status of the Brent Goose Branta bernicla nigricans wintering in East Asia - Sawa, Yusuke; Tamura, Chieko; Ikeuchi, Toshio; Fujii, Kaoru; Ishioroshi, Aisa; Shimada, T.; Tatsuzawa, Shiro; Deng, Xueqin; Cao, Lei; Kim, Hwajung; Ward, David (Wildfowl, 2020)