1. Mohammed V University in Rabat, Faculty of Sciences, Department of Mathematics, Center CeReMAR, Laboratory LMSA, Team GrAAF, Rabat, Morocco
2. Moulay Ismail University, Faculty of Sciences, Department of Mathematics, Laboratory MACS, Team MANTA, Meknes, Morocco
3. Regional Center for Education and Training, Fès-Meknès, Meknès, Morocco