MORRISON, G. S. Perception of natural vowels by monolingual Canadian-English, Mexican-Spanish, and Penninsular-Spanish listeners. Canadian Acoustics, [S. l.], v. 40, n. 4, p. 29–40, 2012. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2580. Acesso em: 7 may. 2024.