Gunaraj, L., Paul, S., Mohammed, J., Sudhagar, E., Thankachan, T. “Optimization of Cutting Parameters for Hard Boring of AISI 4340 Steel Using Signal-to-Noise Ratio, Grey Relation Analysis and Analysis of Variance”, Periodica Polytechnica Mechanical Engineering, 67(4), pp. 259–269, 2023. https://doi.org/10.3311/PPme.21729