Munir, Amnah, Haroon Qazi, Kausar Khan, and Kiran Raja. 2018. “Assessment of Smile Characteristics on Frontal Smiling Photograph Compared to Selfie View. A Pilot Study”. Pakistan Orthodontic Journal 10 (1), 8-13. https://www.poj.org.pk/index.php/poj/article/view/188.