Sarhan, A. , Fen, L. , Yip, M. , Sayuti, M.. "Fuzzy Modeling for Micro EDM Parameters Optimization in Drilling of Biomedical Implants Ti-6Al-4V Alloy for Higher Machining Performance". World Academy of Science, Engineering and Technology, Open Science Index 97, International Journal of Aerospace and Mechanical Engineering (2015), 9(1), 197 - 201.