SATHISH KUMAR; G. RAVI KUMAR. A Seven-Level Grid Connected Inverter for Photovoltaic system. International Journal of Computer Engineering in Research Trends, [S. l.], v. 1, n. 6, p. 586–591, 2014. Disponível em: https://www.ijcert.org/index.php/ijcert/article/view/98. Acesso em: 18 oct. 2026.