F. K. El-Baz, Amal A. Mohamed and Amina A. Aly
Pakistan Journal of Biological Sciences 6 ( 1 ): 16 - 22 , 2003
Hanaa H. Abdel-Baky, M. A. Shallan, Gamal El-Baroty and F. K. El-Baz
Pakistan Journal of Biological Sciences 5 ( 1 ): 61 - 65 , 2002