1. Laboratory of Modeling and Mathematical Structures, Department of Mathematics, Faculty of Science and Technology of Fez, Box 2202, University S.M. Ben Abdellah Fez, Morocco.
2. Department of Mathematics, King Fahd University of Petroleum & Minerals, P.O. Box 278, Dhahran 31261, Saudi Arabia.
3. Laboratory: Mathematics, Computing and Applications – Information Security (LabMiA-SI), Department of Mathematics, Faculty of Sciences, Mohammed-V University in Rabat, Morocco.