1. Business School of Nanjing Normal University, Nanjing 210024, China
2. Department of Management, Ayandegan Institute of Higher Education, Tonekabon 4681853617, Iran
3. Department of Mathematics, Faculty of Arts and Science, Yildiz Technical University, Esenler, Istanbul 34220, Turkey
4. Department of Mathematics & Statistics, American University of the Middle East, Egaila 54200, Kuwait
5. Department of Mathematics, Ayandegan Institute of Higher Education, Tonekabon 4681853617, Iran