1. Nonlinear Analysis and Applied Mathematics (NAAM)-Research
Group, Department of Mathematics, Faculty of Science, King
Abdulaziz University, P.O. Box 80203, Jeddah 21589
2. Department of Mathematics, Faculty of Science, Aljouf University, King Khaled RD, Sakaka 72388, Saudi Arabia
3. Sotiris K. Ntouyas\footnote{Department of Mathematics, University of Ioannina, 451 10
Ioannina, Greece