LYUTSKANOVA, D. Vocal-pedagogical guidelines to help methodological work with mutating voices. Young Scientific Music and Dance Forum : Conference with international participation, [S. l.], n. 13, p. 82–91, 2020. Disponível em: https://ojs.nbu.bg/index.php/YSMDF/article/view/389. Acesso em: 20 apr. 2024.