STAYTIAH, Samir. Vowels Between Theoretical standards and Pronunciation characteristics. Al-Balqa Journal for Research and Studies, [S. l.], v. 2, n. 1, p. 121–159, 1993. Disponível em: https://ajrs.ammanu.edu.jo/ojs/index.php/albalqajournal/article/view/36.. Acesso em: 10 oct. 2026.