Hussain, U., G. Rasool, F. ul Hassan, A. M. Shah, and J. Muhammad. “Comparison of Mesiodistal Widths of Teeth in Crowded Versus Non- Crowded Dentitions”. Pakistan Orthodontic Journal, vol. 7, no. 2, Feb. 2016, pp. 70-75, https://www.poj.org.pk/index.php/poj/article/view/122.