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First Author:
 
Thi hong hanh Pham
University of Rouen
hanh.phamhong@gmail.com
 
University of Rouen, 3, avenue Pasteur
Rouen, Cedex 1, F-76186, France
 
+33(0)2 32 76 96 56(Phone)
+33(0)2 32 76 96 56(Fax)

Second Author:

Duc thinh Nguyen
Ministry of Planning and Investment of Vietnam
hnihtcud@yahoo.com
 
Hanoi, Vietnam