USTIMENKO, D. V.; NIKITENKO, A. V. It’s effective to set down systems with frequency – controlled by electrical accessories. Science and Transport Progress , [S. l.], n. 37, p. 116–119, 2011. DOI: 10.15802/stp2011/9440. Disponível em: https://stp.ust.edu.ua/article/view/9440. Acesso em: 29 apr. 2024.