1. Department of Mathematics, Faculty of Sciences, Saad Dahlab University, Blida 09000, Algeria
2. Lab. LPTHIRM, Faculty of Sciences, Saad Dahlab University, Blida 09000, Algeria
3. Department of Mathematics, Faculty of Science and Technology, UDBKM University, Khemis Miliana 44225, Algeria
4. Faculty of Technical Sciences, University of Novi Sad, Trg D. Obradovića 6, 21125 Novi Sad, Serbia
5. Department of Mathematics, National Kaohsiung Normal University, Kaohsiung 82444, Taiwan