1. Nonlinear Analysis Research Group, Ton Duc Thang University, Ho Chi Minh
City, Vietnam
2. Department of Mathematics, Karaj Branch, Islamic Azad
University, Karaj, Iran
3. Faculty of Technology, Bulevar cara Lazara 1, University of Novi Sad, Serbia
4. Department of Mathematics, University of Management and Technology, C-II Johar Town, Lahore, Punjab, Pakistan
5. Vienna University of Technology, Institute of Computer Languages
Argentinierstr 8, 1040 Vienna
6. Faculty of Sciences and Mathematics, University of Pri\v{s}tina, Lole Ribara 29, Kosovska Mitrovica, 38220 Serbia