LEVI, E. Music and singing formats around the world through the view of the vocal teacher. Young Scientific Music and Dance Forum : Conference with international participation, [S. l.], n. 15, p. 70–87, 2022. Disponível em: https://ojs.nbu.bg/index.php/YSMDF/article/view/608. Acesso em: 26 apr. 2024.