MUKHA, A. M. Optimum working - points of traction transformer with over frequency. Science and Transport Progress , [S. l.], n. 36, p. 93–99, 2011. DOI: 10.15802/stp2011/8718. Disponível em: https://stp.ust.edu.ua/article/view/8718. Acesso em: 4 may. 2024.