Shaheen, Asmi, Muhammad Ilyas, Afeef Umar Zia, Maria Tanvir, Saman Tariq, and Tayyeba Zubair. “Perception of Changes in Soft Tissue Profile in Silhouettes After Face Mask Therapy”. Pakistan Orthodontic Journal 12, no. 2 (April 12, 2021): 103-108. Accessed September 23, 2021. https://poj.org.pk/index.php/poj/article/view/295.