1. Department of Mechanical Engineering, ENSET, University of Douala, Douala, Cameroon
2. Laboratory of Mechanic (LM), Doctoral Training Unit in Engineering Sciences (UFD-SI), University of Douala, Douala, Cameroon
3. Groupe de Recherche des Matériaux Innovants (GRMI), Université de Douala, Douala, Cameroun