สกลวสันต์ ฉ. (2015) “Caries status of sealed first permanent molars in primary school students, Nan province”, Thai Dental Public Health Journal. Bangkok, Thailand, 20(3), pp. 9–16. available at: https://he02.tci-thaijo.org/index.php/ThDPHJo/article/view/150922 (accessed: 18 September 2026).