Tartakovskyi, E., Falendysh, A., Zinkivskyi, A. and Mikheev, S. 2015. Refining the models of performing service tests of upgraded locomotives. Eastern-European Journal of Enterprise Technologies. 2, 3(74) (Apr. 2015), 26–31. DOI:https://doi.org/10.15587/1729-4061.2015.39849.