Pervez, H., A. Naseer, S. shah, R. Haqqui, A. Naseer, F. Azam, and W. Ahmed. “EVALUATION OF UPPER AIRWAY DIMENSION IN ALL FOUR FIRST PREMOLAR EXTRACTION CASES”. Journal of Liaquat University of Medical & Health Sciences, vol. 20, no. 02, July 2021, pp. 122-6, http://121.52.154.205/index.php/jlumhs/article/view/687.