Naief Al-Khazraji, Ahmed, and Mahdi Noman Moslem Shareef. “Enhancement of Endurance Limit of Fiber Glass Composite Material Due to Shot Peening Process”. Journal of Engineering and Sustainable Development, vol. 19, no. 2, Mar. 2015, pp. 141-53, https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/811.