SABLIN, O. I. ELECTRONIC TRACTION DC SYSTEM - SYSTEM OF UNSTABLE CURRENT. Science and Transport Progress , [S. l.], n. 14, p. 67–71, 2007. DOI: 10.15802/stp2007/17834. Disponível em: https://stp.ust.edu.ua/article/view/17834. Acesso em: 29 apr. 2024.