English Problematic Diphthongs for Pashto Speakers: An Acoustic Analysis . Pakistan Journal of Society, Education and Language (PJSEL), [S. l.], v. 7, n. 1, p. 109–123, 2021. Disponível em: https://www.pjsel.jehanf.com/index.php/journal/article/view/382. Acesso em: 20 apr. 2026.