JUMANIYOZOV, K. OBJECTIVES AND TASKS OF VOCATIONAL WORK AND SINGING WITH TWO VOICES IN THE MIDDLE CLAS. International Bulletin of Engineering and Technology, [S. l.], v. 3, n. 6, p. 210–212, 2023. Disponível em: https://www.internationalbulletins.com/intjour/index.php/ibet/article/view/839. Acesso em: 28 jun. 2026.