Omar Mahmoud, Abdul Razzaq, Al-Taie Hazem, Khalil Khalaf. “Effect of Notch Formation Method on Fatigue Resistance for Ck45 Carbon Steel Based on the Notch Sensitivity Factor”. Design Engineering, Oct. 2021, pp. 3364 -76, http://thedesignengineering.com/index.php/DE/article/view/5274.