Razi, A., S. A. Ab Shukor, and P. K. Shen. 2018. “Improved Harmonic Performance of Seven-Level CHB Inverter Using Multicarrier Modulation and Varying the Modulation Index”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 10 (1-7):53-57. https://jtec.utem.edu.my/jtec/article/view/3598.