ANDRZEJ MIECZYSŁAW WĘDZIK. HELM – a new method of calculating power flows in power grids. Acta Energetica, [S. l.], n. 01, p. 58–63, 2019. Disponível em: https://www.actaenergetica.org/index.php/journal/article/view/36. Acesso em: 6 may. 2024.