1. Laboratory of Mechanics, Materials, and Modelization, National School of AGRO-Industrial Sciences (ENSAI) Physics Application and Engineering, Ngaoundere University, Ngaoundere, Cameroon
2. LERMAB-ENSTIB, University of Lorraine, Epinal, France
3. Laboratory of Materials Mechanics, Structures and Integrated Manufacturing, National Advanced School of Engineering, Yaoundé 1 University, Yaoundé, Cameroon
4. Laboratory of Mechanic, Materials and Building, Sahel Institute of Maroua University, Maroua, Cameroon