DRAGANOVA, R. On the first Bulgarian music textbooks and collections with children‘s and school songs. Young Scientific Music and Dance Forum : Conference with international participation, [S. l.], n. 14, p. 33–44, 2021. Disponível em: https://ojs.nbu.bg/index.php/YSMDF/article/view/579. Acesso em: 3 jul. 2024.