Huu, Phan Nguyen, Duc Nguyen Van, and Bong Pham Van. “Application of Response Surface Methodology for Evaluating Material Removal in Rate Die-Sinking EDM Roughing Using Copper Electrode”. VNUHCM Journal of Engineering and Technology 1, no. 1 (August 1, 2019): 20-27. Accessed April 25, 2024. http://stdjet.scienceandtechnology.com.vn/index.php/stdjet/article/view/523.