[1] Islamic Azad Univ Arak, Dept Ind Engn, Arak, Iran
[2] Islamic Azad Univ, Fac Management, Arak Branch, Arak, Iran
[3] Univ Craiova, Fac Econ & Business Adm, Craiova, Romania
[4] Univ Craiova, Doctoral Sch Econ Sci, Craiova, Romania
[5] Islamic Azad Univ Arak, Dept Civil Engn, Arak, Iran
[6] Manipal Acad Higher Educ, Manipal Inst Management, Manipal, Karnataka, India
[7] Univ Craiova, Fac Law, Dept Publ Law & Adm Sci, Craiova, Romania