Mengal, N., N. Muhammed, J. Hammad, H. Naseer, and K. A. Alizai. “Association Between Maxillo-Mandibular Sagittal Relationship and Pharyngeal Passage Dimensions in Class I Skeletal Pattern”. Pakistan Orthodontic Journal, vol. 6, no. 2, Dec. 2014, pp. 53-59, https://poj.org.pk/index.php/poj/article/view/99.