SULAIMONOVA, G. N. . The Theory of Vibrational Oscillation of the Singing Voice. European Journal of Life Safety and Stability (2660-9630), [S. l.], v. 24, p. 16-19, 2022. Disponível em: http://ejlss.indexedresearch.org/index.php/ejlss/article/view/913. Acesso em: 5 oct. 2025.