K. Singh, N. et al. 2018. Comparison of Gas Assisted Hybrid EDM, Rotary EDM and Conventional EDM Processing of High Carbon High Chromium Die Steel. International Journal of Engineering & Technology. 7, 3.12 (Jul. 2018), 1154–1160. DOI:https://doi.org/10.14419/ijet.v7i3.12.17779.