Sysyn, Mykola, Olga Nabochenko, Vitalii Kovalchuk, and Ulf Gerber. 2019. “EVALUATION OF RAILWAY BALLAST LAYER CONSOLIDATION AFTER MAINTENANCE WORKS”. Acta Polytechnica 59 (1):77-87. https://doi.org/10.14311/AP.2019.59.0077.