Anwar, A., M. S. Baig, S. M. Bukhari, H. Pasha, and Z. Khalid. “Reliability of Beta Angle in Determination of Sagittal Skeletal Discrepancy in Class II Patients”. Pakistan Orthodontic Journal, vol. 7, no. 2, Feb. 2016, pp. 56-59, https://poj.org.pk/index.php/poj/article/view/119.