Durrani, O. K., K. Zulfiqar, U. Bashir, and M. Shamsher. “Prevalence of Tooth Agenesis in Orthodontic Patients at Islamic International Dental Hospital”. Pakistan Orthodontic Journal, vol. 2, no. 2, Dec. 2010, pp. 48-51, https://mail.poj.org.pk/index.php/poj/article/view/3.