[1] Urgench State Univ, Fac Socio Econ Sci, Urgench 220100, Uzbekistan
[2] Urgench State Univ, Fac Sports & Art, Urgench 220100, Uzbekistan
[3] Jeonbuk Natl Univ, Coll Commerce, Dept Int Trade, Jeonju 54896, South Korea
[4] Zurich Univ Appl Sci ZHAW, Inst Nat Resource Sci, CH-8820 Wadenswil, Switzerland
[5] Urgench Ranch Univ Technol, Fac Econ & Engn Technol, Urgench 220100, Uzbekistan
[6] Jizzakh Polytech Inst, Fac Serv, Jizzakh 130100, Uzbekistan
[7] Tashkent State Univ Econ, Dept Appl Math, Tashkent 100066, Uzbekistan
[8] Mamun Univ, Fac Econ & Humanities, Khiva 220900, Uzbekistan
[9] Purdue Univ, Sch Hospitality & Tourism Management, W Lafayette, IN 47907 USA