SHIMADA, Tetsuo; MORI, Akira; HIGUCHI, Hiroyoshi. Trends in the abundance of diving ducks and seaducks wintering in Japan. Wildfowl, [S. l.], p. 176–185, 2016. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153675. Acesso em: 13 feb. 2026.