Butt, F., M. Iqbal, A. Jawed, U. Khan, M. Hanif, and A. Sarwar. “INTERDENTAL CLEANING: A CROSS-SECTIONAL SURVEY”. Pakistan Oral & Dental Journal, Vol. 37, no. 3, Sept. 2017, pp. 452-4, https://podj.com.pk/index.php/podj/article/view/59.