M.Shanmugam, M.P.Agathiyan, R.S.Hariharan, B.Jayasuriya, and R.Manoj Kumar. “Multi Objective Optimization in Turning of AISI 4340 Alloy Steel Using Response Surface Methodology”. International Journal of Intellectual Advancements and Research in Engineering Computations, vol. 6, no. 1, Mar. 2018, pp. 642-5, https://ijiarec.com/ijiarec/article/view/522.