Bondarev, O. M., E. M. Dzichkovskyy, O. E. Kryvchykov, and V. M. Skoblenko. “Hardness Indices Estimation of Supporting Structure Elements of Motor Bogies of the Electric Train ED9M”. Science and Transport Progress , no. 5(47) (October 25, 2013): 89–96. Accessed May 7, 2024. https://stp.ust.edu.ua/article/view/17970.