1. Ibn Zohr University, Polydisciplinary Faculty of Ouarzazate, BP.638,Lab Peti-ERMAM,Ouarzazate,Morocco,45000
2. Fianarantsoa University,LAPAUF,Fianarantsoa,Madagascar
3. Moulay Ismail University of Meknes, BP 509 Boutalamine,Faculty of Sciences and Techniques,OTEA Department of physics,Errachidia,Morocco,52000