SPRAGENS, Kyle A.; BJERRE, Emily R.; BLACK, Jeffrey M. Black Brant Branta bernicla nigricans grit acquisition at Humboldt Bay, California, USA. Wildfowl, [S. l.], p. 104–115, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153609. Acesso em: 16 dec. 2025.