M. K. Pradhan and  C. K. Biswas and ,  Neuro-fuzzy Model and Regression Model a Comparison Study of MRR in Electrical Discharge Machining of D2 Tool Steel.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2009, vol. 33(9). 1126 - 1131
    [viewed 29 November 2020]. Available from: https://publications.waset.org/pdf/4879.