Hung, Wayne NP, Zhujian Feng, and Paul Lomeli. “Computer Simulation of Low Frequency Vibration in Electrochemical Machining”. International Journal of Engineering Materials and Manufacture 6, no. 1 (January 30, 2021): 1-21. Accessed March 7, 2021. http://deerhillpublishing.com/index.php/ijemm/article/view/143.