1. Drozdiel P., Bukova B., Brumercikova E., Transport Problems 10, 4 (2015)
2. Skrucany T., Kendra M., Sarkan B., Gnap J., Communications in Computer and Information Science, 531 (2015)
3. Mesko P., Gasparik J., Gaborova V., Proceedings of the 20th International Scientific Conference Transport Means (2016)
4. Poliak M.. EKONOMICKY CASOPIS. 61, 2. 206–220. (2013)