Visin, M. H., B. T. Vlasenko, and D. H. Bilyi. “Increasing Reliability of Stepped Automatic Starting and Rheostat Breaking System of Electric Trains ER9T and EPL9T”. Science and Transport Progress , no. 35 (December 25, 2010): 74–80. Accessed December 22, 2024. https://stp.ust.edu.ua/article/view/8890.