Ousmane Samba Coulibaly1,*, Boureima Sangaré2
1Department of Mathematics, University of Science, Techniques and Technologies of Bamako (USTTB), Bamako, Mali.
2Department of Mathematics, University Nazi BONI, Bobo-Dioulasso, Houet, Burkina Faso.
*Corresponding author: Ousmane Samba Coulibaly
References
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