1. Laboratory of Operator Theory and PDEs: Foundations and Applications, Department of Mathematics, Faculty of Exact Sciences University of El Oued El Oued Algeria
2. Department of Mathematics, College of Sciences and Arts, ArRas Qassim University Buraydah Saudi Arabia
3. Laboratory of Fundamental and Applied Mathematics of Oran (LMFAO) University of Oran 1 Ahmed Benbella Algeria
4. Laboratory of pure and applied Mathematics Amar Teledji Laghouat University Algeria