Attar, Hayder J, et al. “The Relation Between Facial Prognathism and Cervical Posture in Skeletal Class I Iraqi Adult Sample”. Journal of Baghdad College of Dentistry, vol. 25, no. 3, Mar. 2013, pp. 149-52, https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/274.