TABREZ, M.; SADHU, P. K.; IQBAL, A. A Novel Three Phase to Seven Phase Conversion Technique Using Transformer Winding Connections. Engineering, Technology & Applied Science Research, Greece, v. 7, n. 5, p. 1953–1961, 2017. DOI: 10.48084/etasr.1190. Disponível em: https://etasr.com/index.php/ETASR/article/view/1190. Acesso em: 7 jul. 2022.