C.Velmurugan, S. Thirugnanam, P. Maithili, R. Ranjithkumar, “OPTIMIZATION OF THE PROCESS CONSTRAINTS IN SPARK EROSION MACHINING OF ALUMINIUM ALLOY AA 6061 HYBRID COMPOSITES USING ARTIFICIAL NEURAL NETWORK”, Pak. J. Biotechnol, vol. 15, no. 2, pp. 303–310, Jun. 2018.