K. WILKOSZ, T. OKOŃ. Power System State Estimation in Polar Coordinate System. Significance of Specific Information on Symmetrical Phase Shifter. Acta Energetica, [S. l.], n. 01, p. 88–94, 2018. DOI: 10.52710/ae.111. Disponível em: https://www.actaenergetica.org/index.php/journal/article/view/111. Acesso em: 3 may. 2024.