W. Khalid, Ahmed, and Abdullhaqq A. Hamid. “Effect of Impact Velocity and Angle on Erosion Behavior for Polymeric Composite Materials”. Al-Rafidain Engineering Journal (AREJ) 24, no. 2 (December 1, 2019): 101–114. Accessed August 7, 2025. https://ojs.uomosul.edu.iq/index.php/arej/article/view/27241.