САБЛИН, О. И. Signs of inactive power in the electric traction system of dc. Eastern-European Journal of Enterprise Technologies, [S. l.], v. 5, n. 8(59), p. 26–29, 2012. DOI: 10.15587/1729-4061.2012.4603. Disponível em: https://journals.uran.ua/eejet/article/view/4603. Acesso em: 17 aug. 2024.