ИВАНОВ, В. Б.; РИХТЕР, М.; СИТАС, В. И. On the question of the comparative effectiveness of vacuum tube and variable-frequency drives. Eastern-European Journal of Enterprise Technologies, [S. l.], v. 3, n. 10(57), p. 32–35, 2012. DOI: 10.15587/1729-4061.2012.4180. Disponível em: https://journals.uran.ua/eejet/article/view/4180. Acesso em: 28 jul. 2024.