Machining on hard to machine materials with Vibration assisted EDM, micro-EDM and WEDM: State of the art review - Pandey, Ashutosh Kumar; Tripathi, Rajeev Mani; Satyendra, Tripathi Adarsh; Chaudhary, Satya Prakash; Mishra, Akshay Kumar (International Journal of Advance Research and Innovative Ideas In Education, 2022)