Bezruchenko, V. M., O. I. Hilievych, O. M. Mukha, and O. V. Shapovalov. “ABOUT THE POSSIBILITY OF UPGRADING THE AC LOCOMOTIVES WITH TRACTION COMMUTATOR MOTORS”. Science and Transport Progress, no. 14, Feb. 2007, pp. 30-34, doi:10.15802/stp2007/17817.