1. Department of Technology, Institute of Technology and Business in České Budějovice, České Budějovice, Czech Republic
2. Faculty of Agriculture, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic
3. Faculty of Economics, University of South Bohemia in České Budějovice, Česke Budějovice, Czech Republic
4. Faculty of Operation and Economics of Transport and Communications, University of Zilina, Žilina, Slovakia
5. Faculty of Management and Economics, Tomas Bata Univesity in Zlín, Zlín, Czech Republic