R. Oloomi and  M. A. Sadrnia,  Optimal Switching Strategies for Tracking of Currents of Voltage Source Converters.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2007, vol. 10(10). 1500 - 1503
    [viewed 16 October 2019]. Available from: https://publications.waset.org/pdf/12988.