V. Karthikeyan, I. William Christopher, V. Jamuna. “Nine Level Symmetrical Modified Multi-Level Cascaded H-Bridge Inverter”. International Journal of Advanced Science and Technology 29, no. 7s (May 19, 2020): 2532 - 2537. Accessed May 3, 2024. http://sersc.org/journals/index.php/IJAST/article/view/16717.