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. 2023;7(1):19-36. Accessed September 4, 2025. https://ejournal.kjpupi.id/index.php/ijost/article/view/37