Billong, Ndigui; Laboratory of Materials Analyses, Local Materials Promotion Authority (MIPROMALO), Yaounde, Cameroon
Boubakar, Likiby; Laboratory of Materials Analyses, Local Materials Promotion Authority (MIPROMALO), Yaounde, Cameroon
Bayiha, B.N.; Department of Civil Engineering, Advanced Technical Teachers Training College, University of Douala, Douala, Cameroon
Melo, Uphie C.; Department of Inorganic Chemistry, Faculty of Science, University of Yaoundé I, Yaounde, Cameroon
Oti, Jonathan; Faculty of Computing, Engineering and Science, University of South Wales, Pontypridd, United Kingdom
Kinuthia, John; Faculty of Computing, Engineering and Science, University of South Wales, Pontypridd, United Kingdom