1. Faculty of Sciences
2. Department of Physics
3. Dr Tahar Moulay University of Saïda
4. 20000 Saïda
5. Algeria
6. Faculty of Physics
7. Department of Materials and Components
8. U.S.T.H.B. Algiers
9. Institut des Sciences et Technologies
10. Département Sciences de la Matière
11. Centre Universitaire Tissemsilt
12. 38000 Tissemsilt
13. Unité de Catalyse et Chimie du Solide (UCCS)
14. UMR CNRS 8181
15. Faculté des Sciences
16. Université d'Artois
17. 62307 Lens
18. Modelling and Simulation in Materials Science Laboratory
19. Physics Department
20. Djillali Liabes University of Sidi Bel-Abbes
21. 22000 Sidi Bel-Abbes