M. A. Iqbal, J. Mohol, F. Afrin, M. A. Khaleque, F. T. Johra, and N. Jannat, “Prevalence of periodontal diseases among the patient visiting at Periodontology OPD Update Dental College Hospital, Dhaka”, Update Dent. Coll. j, vol. 5, no. 2, pp. 23–29, Apr. 2016.