Petrović, D., Bižić, M., Gašić, M., Savković, M. and Gajić, V. (1) “Increasing the Efficiency of Railway Transport by Improvement of Suspension of Freight Wagons”, Promet - Traffic&Transportation, 24(6), pp. 487-493. doi: 10.7307/ptt.v24i6.1202.