WASET
    M. R. Shabgard and  B. Sadizadeh and  H. Kakoulvand,  The Effect of Ultrasonic Vibration of Workpiece in Electrical Discharge Machining of AISIH13 Tool Steel.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2009, vol. 28(4). 404 - 408
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/3380.