Ali, Sarmad Q, and Raja Hadi. “An Assessment of Alpha-Amylase As Salivary Psychological Stress Marker in Relation to Temporomandibular Disorders Among a Sample of Dental Students”. Journal of Baghdad College of Dentistry, vol. 27, no. 4, Dec. 2015, pp. 90-95, https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/955.