BOBIRSHOH GAYBULLAYEVICH NURILLAYEV. Theoretical and methodological system of vocal exercises in the development of vocal stability in students . Academic Journal of Science, Technology and Education, [S. l.], v. 2, n. 5, p. 21–27, 2026. Disponível em: https://integrumpublication.org/index.php/ajste/article/view/226. Acesso em: 20 may. 2026.