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. (2022). Indonesian Journal of Science and Technology, 7(1), 19-36. https://ijost.upi.edu/index.php/ijost/article/view/324