Babu Rao, Thella, Venu Pilli, Nallamotu Revanth Sai Venkat, Nagandla Pavan, and Thalari Shiva Ram. 2018. “Application of Gray Relation Analysis for Multi-Response Optimization of Plasma Heat Assisted Turning Performance”. International Journal of Engineering & Technology 7 (2.32): 143-46. https://doi.org/10.14419/ijet.v7i2.32.15389.