[1] Univ Belgrade, Tech Fac Bor, Belgrade 11000, Serbia
[2] Univ Kragujevac, Fac Hotel Management & Tourism, Kragujevac 34000, Serbia
[3] Fac Business Econ & Entrepreneurship, Mitropolita Petra 8, Belgrade 11000, Serbia
[4] Univ Pitesti, Dept Finance Accounting Econ, Pitesti 110040, Romania
[5] Univ Lucian Blaga Sibiu, Inst Doctoral & Postdoctoral Studies, Sibiu 550025, Romania
[6] Univ Valahia Targoviste, Dept Management, Targoviste 130004, Romania