Ali, Mohammad Yeakub, Md Mazid Abdul, Abdus Sabur, and Mohamed Rahman. “Comparative Study of Material Removal Rate of Single-Spark And Multi-Spark Micro-EDM of Copper”. International Journal of Engineering Materials and Manufacture 7, no. 2 (April 15, 2022): 54–60. Accessed May 18, 2022. https://deerhillpublishing.com/index.php/ijemm/article/view/225.