1. Department of Mathematics and Statistics, International Islamic University, Islamabad, Pakistan
2. Department of Mathematics, Ghazi University, D G Khan, Pakistan
3. Department of Computer Engineering, Biruni University, Istanbul, Turkey
4. Department of Mathematics, Science Faculty, Firat University, 23119 Elazig, Turkey
5. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
6. Laboratoire Lmdan, Département de Mathématiques de la Décision, Université Cheikh AntaDiop de Dakar, Faculté des Sciences Economiques et Gestion, BP 5683 Dakar Fann, Senegal