1. Materials Chemistry Laboratory
2. Department of Chemistry
3. Higher Teacher Training College
4. University of Yaoundé I
5. Yaoundé
6. University of Dschang
7. Dschang
8. Cameroon
9. Faulty of Science
10. University of Buea
11. Buea
12. Physical Chemistry Division
13. National Chemical Laboratory
14. Pune 411008
15. India
16. Pole Bio & Soft Mater
17. Institut de la Matière Condensée et des Nanosciences
18. Université Catholique de Louvain
19. Louvain-La-Neuve
20. Belgium