1. Technical Faculty in Bor, University of Belgrade, 11000 Belgrade, Serbia
2. Faculty of Hotel Management and Tourism, University of Kragujevac, 34000 Kragujevac, Serbia
3. Faculty of Business Economics and Entrepreneurship, Mitropolita Petra 8, 11000 Belgrade, Serbia
4. Department of Finance, Accounting, Economics, University of Pitesti, 110040 Pitesti, Romania
5. Institute of Doctoral and Post-Doctoral Studies, University Lucian Blaga of Sibiu, 550025 Sibiu, Romania
6. Department of Management, University Valahia of Targoviste, 130004 Targoviste, Romania