1. Faculty of Business Management, University of Economics in Bratislava, Dolnozemská Cesta 1/b, 85235 Bratislava, Slovakia
2. Department of Engineering, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy
3. Faculty of National Economy/Department of finance, University of Economics in Bratislava, Dolnozemská cesta 1, 85235 Bratislava, Slovakia
4. Institute of Technology and Business in České Budějovice, Faculty of Corporate Strategy, České Budějovice, Czech Republic