M. Zia-ur-Rehman, Ahmad Usman Zafar, Idrees Ahmad Nasir and Shiekh Riazuddin
Asian Journal of Plant Sciences 1 ( 5 ): 574 - 576 , 2002
Muhammad Zafar, Abdul Nazir, Nasim Akhtar, S.M.H. Mehdi Naqvi and M. Zia-ur-Rehman
Pakistan Journal of Biological Sciences 5 ( 6 ): 733 - 735 , 2002