Ushkalov, V. F., Kostritsa, S. A., Sultan, A. V., Pasichnik, S. S., Fedorov, Y. F. and Dzichkovskiy, Y. M. (2009) “About the measurement of vertical forces when conducting running dynamic tests of freight cars”, Science and Transport Progress , (30), pp. 243–247. doi: 10.15802/stp2009/14638.