S. A. Sonawane, B. P. Ronge, and P. M. Pawar, “Multi-characteristic optimization of WEDM for Ti-6Al-4V by applying grey relational investigation during profile machining”, J. Mech. Eng. Sci., vol. 13, no. 4, pp. 6059–6087, Dec. 2019, doi: 10.15282/jmes.13.4.2019.22.0478.