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First Author:
 
Romuald S Kinda
Université Ouaga II
skinda@univ-ouaga2.bf
 
Ouagadougou, Burkina Faso
 
 
 

Second Author:

Patrice R Zidouemba
Université Nazi Boni
patrice.zidouemba@gmail.com
 
, Burkina Faso
 
 
 

Third Author:

Idrissa M Ouedraogo
Université Aube Nouvelle
Idriss_mo@yahoo.fr