P. Varalaxmi and  A. Kirubakaran,  A Thirteen-Level Asymmetrical Cascaded H-Bridge Single Phase Inverter.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2018, vol. 141(9). 619 - 626
    [viewed 28 April 2024]. Available from: https://publications.waset.org/pdf/10009524.