A. Khemwuttipong, V. Pantumanee, P. Sangwong, and K. Narin, “Oral health status of children aged 3-12 years in Trang province: comparing before, during and after fluoridated milk project in 2014, 2017 and 2020”, Th Dent PH J, vol. 27, pp. 14–27, Sep. 2022.