Phetnin, N., T. Vichayanrat, and C. Anunmana. “Effectiveness of the Oral Health Care Program in Older People with Type 2 Diabetes Mellitus Muang District, Nakhon Ratchasima Province: A Randomized Controlled Trial”. Khon Kaen University Dental Journal, vol. 23, no. 2, Aug. 2020, pp. 1-10, https://he01.tci-thaijo.org/index.php/KDJ/article/view/237407.