Bondarev, O. M., Dzichkovskyy, E. M., Kryvchykov, O. E. and Skoblenko, V. M. (2013) “Hardness indices estimation of supporting structure elements of motor bogies of the electric train ED9M”, Science and Transport Progress , (5(47), pp. 89–96. doi: 10.15802/stp2013/17970.