กรมอนามัย ส. Volume 21 Number 2  July - December 2016. Thai Dental Public Health Journal, Bangkok, Thailand, v. 21, n. 2, p. 0–96, 2016. Disponível em: https://he02.tci-thaijo.org/index.php/ThDPHJo/article/view/215344. Acesso em: 18 sep. 2026.