1. School of Applied Mathematics, Xiamen University of Technology, Xiamen 361024, China
2. Department of Applied Mathematics, Faculty of Mathematical Sciences, University of Tabriz, Tabriz, Iran
3. Natural Sciences Faculty, Lankaran State University, 50, H. Aslanov Str, Lankaran, Azerbaijan
4. Telkom University, Bandung, Indonesia
5. Department of Commodity Research and Commodity Expertise, Plekhanov Russian University of Economics, Moscow, Russia
6. Department of Mathematics, Universitas Islam Negeri Sumatera Utara, Medan, Indonesia
7. Scientific Research Center, Al-Ayen University, Thi-Qar, Iraq
8. Department of System Programming, South Ural State University, 454080 Chelyabinsk, Russia