1. Laboratory LESI, University of Djelali Bounaama , 44225 , Khemis Miliana , Algeria
2. Department of Mathematics, Faculty of Arts and Sciences, Çankaya University , Ankara, 06790 , Turkey
3. Department of Medical Research, China Medical University , Taichung 40402 , Taiwan
4. Department of Mathematics, Faculty of Sciences University of M’hamed Bougara , UMBB , Algeria