Nawaz, R.H. Qureshi, M. Aslam, J. Akhtar and S. Parveen
Pakistan Journal of Biological Sciences 1 ( 4 ): 357 - 359 , 1998
Javaid Akhtar, M. Zahid, S. Parveen and A. Naseem
Pakistan Journal of Biological Sciences 3 ( 10 ): 1627 - 1629 , 2000