“ A New Multicarrier Sinusoidal Pulse Width Modulation (SPWM) Strategy based on Rooted Tree Optimization (RTO) Algorithm for Reducing Total Harmonic Distortion (THD) of Switched-Capacitor Nine-level Inverter in Grid-connected PV systems”, Indonesian J. Sci. Technol, vol. 7, no. 1, pp. 19–36, Nov. 2023, Accessed: Sep. 04, 2025. [Online]. Available: https://ejournal.kjpupi.id/index.php/ijost/article/view/37