Siddiqui, A. P., Nazir, R. and Mahmood, A. (2017) “Effect of sagittal position of maxilla and maxillary incisors inclination on the position of the upper lip”, Pakistan Orthodontic Journal, 9(1), pp. 8–14. Available at: https://poj.org.pk/index.php/poj/article/view/151 (Accessed: 26 August 2026).