1. Faculty MISM, Department of Mathematics, University of 8 May 1945 Guelma, P.O. Box 401, Guelma 24000, Algeria
2. Laboratory of Analysis and Control of Differential Equations “ACED”, Faculty MISM, Department of Mathematics, University of 8 May 1945 Guelma, P.O. Box 401, Guelma 24000, Algeria
3. Department of Mathematics, College of Science, University of Ha’il, Ha’il 55473, Saudi Arabia
4. Mathematics Department, College of Sciences, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia