1. Laboratory of Operator Theory and PDEs: Foundations and Applications, University of El Oued, El Oued, Algeria
2. Department of Mathematics, College of Sciences and Arts, Al-Ras, Qassim University, Kingdom of Saudi Arabia + Laboratory of Fundamental and Applied Mathematics of Oran (LMFAO), University of Oran, Ahmed Benbella, Algeria
3. Laboratory of pure and applied Mathematics, Amar Teledji Laghouat University, Algeria