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Applied Mathematics and Computation 206 ( 2 ): 510 - 520 , 2008
T. Djamah, R. Mansouri, S. Djennoune and M. Bettayeb
Applied Mathematics and Computation 206 ( 2 ): 543 - 554 , 2008
S. Saadi, M. Bettayeb and A. Guessoum
Journal of Applied Sciences 10 ( 7 ): 517 - 525 , 2010