Journal of Biological Sciences 2 ( 4 ): 208 - 211 , 2002
S. A. Sakr, F. A. El-Mesady and N. I. El-Desouki
Journal of Medical Sciences 2 ( 1 ): 24 - 28 , 2002
S. A. Sakr and A.M. Hijji
Pakistan Journal of Biological Sciences 3 ( 10 ): 1705 - 1707 , 2000