Ahmad Zahran and  Ahmed Herzallah and  Ahmad Ahmad and  Mahran Quraan,  Modular Harmonic Cancellation in a Multiplier High Voltage Direct Current Generator.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2018, vol. 142(10). 740 - 745
    [viewed 17 October 2021]. Available from: https://publications.waset.org/pdf/10009672.