Rabis Iqbal, M. Anjum Zia, Tahira Iqbal and Faqir Hussain
Pakistan Journal of Biological Sciences 3 ( 9 ): 1484 - 1486 , 2000
M. Anjum Zia, M. Yaqub, Khalil- ur-Rehman and Tariq Mahmood
Pakistan Journal of Biological Sciences 3 ( 10 ): 1716 - 1718 , 2000