TY JOUR TI Assessment of Impact of Changes in Transported Cargo Indicators on Car Component of Freight Railway Tariff (On the Example of a Coal) KW Car component KW freight railway tariff KW hard coal KW gondola cars KW assessment of indicators change impact JO Bulletin of scientific research results AU Egorov, Y.V. PY 2022 IS 2022 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"