1. Department of Mathematics, Faculty of Sciences Dhar Elmahraz Sidi Mohamed Ben Abdellah University Fez Morocco
2. Division of Applied Mathematics Thu Dau Mot University Thu Dau Mot Vietnam
3. Department of Medical Research China Medical University Hospital Taichung Taiwan
4. École Normale Supérieure Moulay Ismail University Meknes Morocco
5. Department of Mathematics Regional Center of Education and Professional Training Fez Morocco