1. Department of Mathematics and Statistics, Universiti Putra Malaysia, Serdang 43400, Malaysia
2. Department of Mathematics, Andijan State University, Andijan 170100, Uzbekistan
3. V.I.Romanovskiy Institute of Mathematics, Uzbekistan Academy of Sciences, Tashkent 100174, Uzbekistan
4. Department of Higher and Applied Mathematics, Tashkent State University of Economics, Tashkent 100066, Uzbekistan
5. Department of Law, Economics and Human Sciences & Decisions_Lab, University Mediterranea of Reggio Calabria, I-89124 Reggio Calabria, Italy
6. The Banking and Finance Academy of the Republic of Uzbekistan, Tashkent 100000, Uzbekistan