M.R. Rawal, R.R. Kolhapure, S.S. Sutar, and V.D. Shinde. “Optimization of Resistance Spot Welding of 304 Steel Using GRA”. International Journal of Computer Engineering in Research Trends, vol. 3, no. 9, Sept. 2016, pp. 492-9, https://www.ijcert.org/index.php/ijcert/article/view/793.