PONOMARENKO, T. The questions of progress of amateur chorus performance and foims of its organization in the modern terms. Pedagogy of Higher and Secondary Education, Kryvyi Rih, Ukraine, v. 18, n. 2, p. 35–40, 2007. DOI: 10.31812/educdim.5955. Disponível em: https://journal.kdpu.edu.ua/ped/article/view/5955. Acesso em: 13 mar. 2025.