DR. B. M. SAIED, P.; R. A. KHALIL, D.; ANTAR, R. Power Quality Improvement in a HVDC Transmission System Based on a Modified Active Power Filter-ENG. Al-Rafidain Engineering Journal (AREJ), [S. l.], v. 21, n. 5, p. 16–24, 2013. DOI: 10.33899/rengj.2013.79573. Disponível em: https://ojs.uomosul.edu.iq/index.php/arej/article/view/27123. Acesso em: 6 aug. 2025.