Angkanusorn, Tipphawan, Pirasut Rodanant, and Petch Rawdaree. “Impact of Oral Health Knowledge and Attitude on the Severity of Periodontitis among Patients with Type 2 Diabetes Mellitus: A Cross-Sectional Study: Oral Health KNWL & ATT Affecting Periodontitis Severity in T2DM”. Vajira Medical Journal : Journal of Urban Medicine 69, no. 4 (August 4, 2025): e274690. accessed September 18, 2026. https://he02.tci-thaijo.org/index.php/VMED/article/view/274690.