1. School of Tourism, Hainan University, Haikou 570228, China
2. Department of Chemical Engineering, Haldia Institute of Technology, Pin-721657, Haldia, India
3. Department of Mathematics, Faculty of Arts and Science, Yildiz Technical University, Esenler 34210, Istanbul, Turkey
4. Multidisciplinary Center for Infrastructure Engineering, Shenyang University of Technology, Shenyang 110870, China
5. Faculty of Organizational Sciences, University of Belgrade, Belgrade 11000, Serbia
6. Department of Mathematics, University of Aleppo, Aleppo, Syria