1. Department of Mathematics, Faculty of Sciences of Sfax, Sfax University, Sfax, Tunisia
2. Laboratory of Physical Chemistry and Biology of Materials, Higher Normal School of Technological Education (ENSET), Skikda 21000, Algeria
3. ENSIIE, University of Evry-Val-d’Essonne, 1 Square de la Résistance, 91025 Évry-Courcouronnes Cedex, France
4. Department of Statistics and Operations Research, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia