อนุกูล ด. The Vocal Organ for Singing,Voice Classification and Voice Preservation. Parichart Journal, [S. l.], v. 27, n. 2, p. 209–221, 2015. Disponível em: https://so05.tci-thaijo.org/index.php/parichartjournal/article/view/43066. Acesso em: 15 may. 2024.