กรมอนามัย ก. Volume 4 Number 2 July - December 1999. Thai Dental Public Health Journal, Bangkok, Thailand, v. 4, n. 2, p. 1–80, 1999. Disponível em: https://he02.tci-thaijo.org/index.php/ThDPHJo/article/view/213878. Acesso em: 20 sep. 2026.