University of Yaounde I - Faculty of Science, University of Yaounde I - Faculty of Science, University of Yaounde I - Faculty of Science, University of Bamenda, University of Yaounde I - Faculty of Science, University of Yaounde I - Faculty of Science, University of Yaounde I - Faculty of Science, University of Yaounde I - Faculty of Science, University of Yaounde I - Faculty of Science, University of Pretoria - Department of Chemistry, University of Pretoria, University of Pretoria, University of Yaounde I - Faculty of Science and University of Yaounde I - Faculty of Science

University of Douala, University of Yaounde II, University of Douala, University of Yaounde I - Faculty of Science, University of Yaounde I - Faculty of Science and University of Yaounde II