Salem. A. Sultan, Samir S. Abubaker, .Abdarazag A, and Hassan, Salah Iddin A. S. Issa. “Optimization of Cutting Parameters for Surfaces Roughness of Medium Carbon Steel C-45 in CNC Turning Machining by Using Taguchi Method”. Surman Journal of Science and Technology, vol. 3, no. 1, Dec. 2021, pp. 047-58, https://sjst.scst.edu.ly/index.php/sjst/article/view/27.