NART, S. THE OPINIONS AND SUGGESTIONS OF THE INSTRUCTORS REGARDING THE PROBLEMS FACED DURING UNDERGRADUATE INDIVIDUAL VOICE EDUCATION COURSES. International Online Journal of Education and Teaching, [S. l.], v. 6, n. 4, p. 845–864, 2019. Disponível em: https://iojet.org/index.php/IOJET/article/view/663. Acesso em: 8 jan. 2026.