RASHID AJEL, Ahmed. MODIFYING HYBRID MULTILEVEL INVERTER EMPLOYING BY USING PWM AND PI CONTROL TECHNIQUES. Journal of Engineering and Sustainable Development, Baghdad, Iraq, v. 20, n. 3, p. 121–128, 2016. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/662.. Acesso em: 13 jun. 2026.