1. Department of Management, Faculty of Economics and Management, Czech University of Life Sciences Prague, Prague, Czech Republic
2. Department of Statistics, Faculty of Economics and Management, Czech University of Life Sciences Prague, Prague, Czech Republic
3. Management Club at the Faculty of Economics and Management, Czech University of Life Sciences Prague, Prague, Czech Republic
4. Department of Production Engineering and Safety, Faculty of Management, Czestochowa University of Technology, Czestochowa, Poland