คงนวน ส. Sine and Cosine Functions on Human Breath. KKU Science Journal, [S. l.], v. 40, n. 3, p. 828–843, 2012. Disponível em: https://ph01.tci-thaijo.org/index.php/KKUSciJ/article/view/253169. Acesso em: 1 oct. 2026.