Waithongkam, Amphon, Penpan Laohapand, and Thitiwan Teparat-Burana. “Patient accessibility to supportive periodontal therapy and the occurrence of recurrent periodontitis: a retrospective study in the Faculty of Dentistry, Mahidol University”. Mahidol Dental Journal 42, no. 2 (June 18, 2022): 109–118. accessed February 10, 2025. https://he02.tci-thaijo.org/index.php/mdentjournal/article/view/254620.