Apinan Aurasopon,  Resonant DC Link in PWM AC Chopper.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2009, vol. 32(8). 1508 - 1512
    [viewed 25 January 2020]. Available from: https://publications.waset.org/pdf/8172.