KNAPTON, R. W.; SEXTON, D. A. Winter Courtship Behaviour in Bohemian Waxwings. Blue Jay, [S. l.], v. 36, n. 3, 1978. DOI: 10.29173/bluejay4653. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/4653. Acesso em: 15 aug. 2022.