LYUTSKANOVA, D. Vocal-pedagogical guidelines assisting the methods of working with mutating voices. Young Scientific Music and Dance Forum : Conference with international participation, [S. l.], n. 14, p. 90–100, 2021. Disponível em: https://ojs.nbu.bg/index.php/YSMDF/article/view/583. Acesso em: 19 may. 2024.