DR. CARLOS RUIZ. Digital PWM-Controlled Seven-Level Symmetrical Multilevel Inverter for Improved Power Quality and Efficiency. International Research Journal of Computer and Electronics Engineering, [S. l.], v. 9, n. 2, p. 8088, 2022. Disponível em: https://urgcee.org/index.php/ircee/article/view/76. Acesso em: 21 oct. 2026.