Kumar Maurya, Rajesh, et al. “Optimum Selection of Process Parameters in EN-31Alloy Steel for Surface Roughness and MRR Using Taguchi Method”.
International Journal of Engineering and Technology, vol. 7, no. 4.39, Dec. 2018, pp. 447-53,
https://doi.org/10.14419/ijet.v7i4.39.24122.