CAREY, Michael. CALL Visual Feedback for Pronunciation of Vowels: Kay Sona-Match. CALICO Journal, [S. l.], v. 21, n. 3, p. 571–601, 2013. DOI: 10.1558/cj.v21i3.571-601. Disponível em: https://journal.equinoxpub.com/Calico/article/view/17216.. Acesso em: 16 jul. 2024.