Taqi, S. A., and S. K. Shather. “Influence of Polarity of Electro Discharge Machine (EDM) on Surface Roughness (SR) and Metal Removal Rate (MRR) of Low Carbon Steel”. Engineering and Technology Journal, Vol. 38, no. 7A, July 2020, pp. 975-83, doi:10.30684/etj.v38i7A.469.