K. Louhab, N. Sahmoune, J. Addad and S. Barr
Journal of Applied Sciences 6 ( 9 ): 2077 - 2082 , 2006
K. Louhab, J. Addad, S. Barr and B. Goma
Journal of Applied Sciences 6 ( 11 ): 2486 - 2490 , 2006