|  | 
	
		| First Author:
 
 | 
	
		|  | 
	
		| Lansana  Bangoura | 
	
		| CIAPHS/University of Rennes 2 ; CRESE-University of Franche-Comte | 
	
		| labangoura@gmail.com | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
	
		| Second Author: 
 
 | 
	
		| Diadié  Diaw | 
	
		| CIAPHS/University of Rennes 2 ; CREAM/University of Rouen | 
	
		| diadie.diaw@univ-rennes2.fr | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
	
		| Third Author: 
 
 | 
	
		| Karim  Barkat | 
	
		| CERGAM-CAE/University of Aix-Marseille 3 | 
	
		| barkat.karim@hotmail.fr | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  | 
	
		|  |