Alajwadi, Saif Alarab. “The Effect of Bleaching Agent on the Micro Hardness of Composite Resins”. Journal of Baghdad College of Dentistry 20, no. 1 (January 31, 2017): 14-15. Accessed November 30, 2019. http://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/1684.