Authors
Zuzana Gerhátová
zuzana.gerhatova@stud.uniza.sk
Žilinská univerzita v Žiline, Faculty of Operation and Economics of Transport and Communications, Žilina, Slovakia
Vladislav Zitrický
vladislav.zitricky@fpedas.uniza.sk
Žilinská univerzita v Žiline, Faculty of Operation and Economics of Transport and Communications, Žilina, Slovakia
Vladimír Klapita
vladimir.klapita@fpedas.uniza.sk
Žilinská univerzita v Žiline, Faculty of Operation and Economics of Transport and Communications, Žilina, Slovakia