1. Department of Civil Engineering, University Tahri Mohamed of Bechar, Bechar, Algeria
2. Laboratory of Materials and Hydrology (LMH), University of Sidi Bel Abbes, Sidi Bel Abbes, Algeria
3. Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
4. Department of Mathematics, Faculty of Science, Kafrelsheikh University, Kafrelsheikh, Egypt