1. Laboratory of Applied Mathematics, Department of Mathematics, Annaba University, Annaba, Algeria
2. Department of Mathematics and Informatics, University of Souk Ahras, Souk Ahras, Algeria
3. Department of Mathematics, Çankaya University, 06790 Etimesgut, Ankara, Turkey
4. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
5. Department of Mathematics, Hodeidah University, Al-Hodeidah, Yemen