S. Mahmood, I. Hussain, M. Sarwar, T.H. Shah and L. A. Khan
Pakistan Journal of Biological Sciences 1 ( 2 ): 81 - 83 , 1998
Aman Ullah Chaudhry and M. Sarwar
Pakistan Journal of Biological Sciences 2 ( 1 ): 242 - 243 , 1999