Affiliation: | 1. Department of Mathematics, Faculty of Science, University of Yaounde I, P.O. Box 812 Yaounde, Cameroon
African Center of Excellence in Information and Communication Technologies, University of Yaounde I, Cameroon;2. Department of Mathematics, Faculty of Science, University of Yaounde I, P.O. Box 812 Yaounde, Cameroon
IRD UMI 209 UMMISCO, University of Yaounde I, P.O. Box 337, Cameroon
LIRIMA-EPITAG Team Project, University of Yaounde I, P.O. Box 812 Yaounde, Cameroon;3. Department of Mathematics and Applied Mathematics, University of Pretoria, 0002 Pretoria South Africa;4. Department of Mathematics and Computer Science, University of Douala, P.O. Box 24157, Cameroon
IRD UMI 209 UMMISCO, University of Yaounde I, P.O. Box 337, Cameroon
LIRIMA-EPITAG Team Project, University of Yaounde I, P.O. Box 812 Yaounde, Cameroon |