Quach, Thanh Hải, Đức Trí Do, and Minh Ẩn Bui. 2016. “Carrier Pwm Technique to Reduce Switching for 5 Levels H Brigde Npc Inverter”. Journal of Technical Education Science 11 (3):7-14. https://www.jte.edu.vn/index.php/jte/article/view/409.