Alalkawi, H. J. M., Basim A. Sadkhan, and Noor N. Abed. 2015. “Laser Peening on Aluminum Alloy 7049 Using Black Paint Surface Coating”. Al-Khwarizmi Engineering Journal 11 (3). https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/254.