Authors
Zdenka Bulková
zdenka.bulkova@fpedas.uniza.sk
Faculty of Operation and Economics of Transport and Communications, University of Žilina
Jozef Gašparík
jozef.gasparik@fpedas.uniza.sk
Faculty of Operation and Economics of Transport and Communications, University of Žilina
Vladislav Zitrický
vladislav.zitricky@fpedas.uniza.sk
Faculty of Operation and Economics of Transport and Communications, University of Žilina