Nahidh, Mohammed, and Sara M J Al-Mashhadany. “Beta Angle in a Sample of Iraqi Adults With Class I Skeletal and Dental Relations and Its Correlation With Other Craniofacial Measurements”. Journal of Baghdad College of Dentistry, vol. 25, no. 4, Dec. 2013, pp. 145-50, https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/185.