Trần, T., N. Nguyễn, and K. Phạm. “IPD, POD and APOD Multi-Carrier PWM Techniques for Five-Level Nested Neutral Point Clamped Inverter”. Journal of Measurement, Control, and Automation, vol. 28, no. 2, Aug. 2024, pp. 1-11, https://mca-journal.org/index.php/mca/article/view/190.