M. Nayeemuddin and  T. Bramhananda Reddy and  M. Vijaya Kumar,  Level Shifted Carrier Signal Based Scalar Random Pulse Width Modulation Algorithms for Cascaded Multilevel Inverter Fed Induction Motor Drive.   journal   = {International Journal of Electrical and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2019, vol. 151(7). 507 - 515
    [viewed 14 November 2019]. Available from: https://publications.waset.org/pdf/10010593.