สะสมสิน ส. Handbook Developing in Upper Register on Trombone. Journal of Information Technology and Innovation, [S. l.], v. 18, n. 2, p. 105–116, 2019. Disponível em: https://so03.tci-thaijo.org/index.php/oarit/article/view/220548. Acesso em: 16 sep. 2026.