1. Unité de Recherche de Matière Condensée, d‘Electronique et de Traitement du Signal (LAMACETS), Department of Physics, University of Dschang, Dschang, Cameroon
2. Laboratory of Industrial and Systems Engineering Environment (LISEE), IUT/FV Bandjoun, University of Dschang, Bandjoun, Cameroon
3. Laboratory of Modelling and Simulation in Engineering, Biomimetics and Prototypes and TWAS Research Unit, Faculty of Science, University of Yaoundé I, Cameroun