Tishchenko, V., et al. “DETERMINATION OF THE FREQUENCY OF NATURAL OSCILLATIONS OF THE ELEMENTS OF THE MECHANICAL SYSTEM OF THE MOTOR CARRIAGE ROLLING STOCK”. Municipal Economy of Cities. Series: «Economy Science», vol. 4, no. 178, Sept. 2023, pp. 293-8, doi:10.33042/2522-1809-2023-4-178-293-298.