HIGGINS, C.; HODGE, M. F2/F1 vowel quadrilateral area in young children with and without dysarthria. Canadian Acoustics, [S. l.], v. 29, n. 3, p. 66–67, 2001. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1386. Acesso em: 24 apr. 2024.