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First Author:
 
Wafa Snoussi
Hihg institute of management tunisia ISG Tunis
wafa_snoussi@yahoo.fr
 
wafa_snoussi@yahoo.fr
, Tunisia
 
+216.97.981.575(Phone)
+216.97.981.575(Fax)

Second Author:

Mhamed ali El-aroui
university of management Nabeul
mhamed.elaroui@yahoo.com