1. R.O.I Group, Computer Sciences Department, Faculty of Sciences and Technics, Moulay Ismaïl University, Errachidia, Morocco
2. GL-ISI, Computer Sciences Department, Faculty of Sciences and Technics, Moulay Ismaïl University, Errachidia, Morocco.
3. R.O.I Group, Mathematical Department, Faculty of Sciences and Technics, Moulay Ismaïl University, Errachidia, Morocco