1. Department of Petroleum Management and Economics, Oil Higher National Institute of Mao, N’Djamena, Chad
2. Center for Energy and Industrial Environment Studies, Universiti Tun Hussein Onn Malaysia 86400 Parit Raja, Batu Pahat, Malaysia
3. Faculty of Exact and Applied Science, University of N’Djamena, N’Djamena, Chad
4. Department of Sciences and Management of Environment, Faculty of Sciences, University of Liège, Arlon, Belgium
5. Department of Thermal and Energy Engineering, Douala Institute of Technology, Douala, Cameroon
6. Laboratory of Energy, Materials, Modelling and Methods, National Higher Polytechnic School of Douala, University of Douala, Douala, Cameroon