A.Ben Abdelali, A. Mtibaa, E. Bourennane and M. Abid
Asian Journal of Information Technology 5 ( 9 ): 976 - 984 , 2006
Mtibaa, A., A. Sboui and E. Bourennane
International Journal of Soft Computing 1 ( 4 ): 261 - 270 , 2006