NGUYEN, V. N.; PHAM , N. H. Carrier PWM control of cascade multilevel inverter for three-phase four-wire shunt active filter. Journal of Technical Education Science, [S. l.], v. 5, n. 3, p. 38–45, 2010. Disponível em: https://jte.edu.vn/index.php/jte/article/view/811. Acesso em: 8 apr. 2026.