M, ASHFAQ AHMED, et al. “Prevalence of Gingivitis in Patients Undergoing Orthodontic Treatment Between Age Group Of 25-35 Years - A Retrospective Study”. The Journal of Contemporary Issues in Business and Government, vol. 27, no. 2, Apr. 2021, pp. 2972-80, https://www.cibgp.com/index.php/1323-6903/article/view/1202.