Nguyen, V. N. and Pham , N. H. (2010) “Carrier PWM control of cascade multilevel inverter for three-phase four-wire shunt active filter”, Journal of Technical Education Science, 5(3), pp. 38–45. Available at: https://www.jte.edu.vn/index.php/jte/article/view/811 (Accessed: 7 April 2026).