1. Faculty of Management and Economics, Tomas Bata University in Zlín, Mostní 5139, 760 00 Zlín, Czech Republic
2. Faculty of Economics, Technical University of Košice, Nemcovej 32, 040 01 Kosice, Slovakia
3. Research Department of Economics and Natural Resources Management, Institute of Technology and Business in České Budějovice, Okružní 517/10, 370 01 České Budějovice, Czech Republic