Asia Riaz, Muhammad Aslam and Nazia Suleman
Pakistan Journal of Biological Sciences 3 ( 6 ): 1033 - 1036 , 2000
Nazia Suleman, Muhammad Aslam and Asia Riaz
Pakistan Journal of Biological Sciences 3 ( 6 ): 1029 - 1032 , 2000
Muhammad Aslam and Nazia Suleman
Pakistan Journal of Biological Sciences 2 ( 1 ): 199 - 200 , 1999