Saribas, Ebru, Filiz Acun Kaya, Arzum Guler Dogru, and Tuba Talo Yildirim. “Determination of Periodontal Status and Smoking Habits With CPITN Index”. International Dental Research 7, no. 2 (August 31, 2017): 26–31. Accessed April 28, 2024. https://www.dental-research.com/idr/article/view/18.