1. Department of Road and Urban Transport, Faculty of Operational and Economics of Transport and Communications, University of Zilina, Univerzitná 1, 010 26 Zilina, Slovakia
2. Department of Economics, Faculty of Operational and Economics of Transport and Communications, University of Zilina, Univerzitná 1, 010 26 Zilina, Slovakia
3. Faculty of Business, Pan-European University, Spálená 76/14, 110 00 Prague, Czech Republic
4. Department of Administration and Public Management, Faculty of Administration and Public Management, Bucharest University of Economic Studies, Piața Romană, 010371 Bucharest, Romania