M. I. El-Hawary, I. El-Hawary Fatma, A. M. El-Ghamry and E. El-Naggar
Pakistan Journal of Biological Sciences 5 ( 11 ): 1181 - 1185 , 2002
E. M. El-Naggar and A. M. El-Ghamry
Pakistan Journal of Biological Sciences 4 ( 7 ): 775 - 778 , 2001