Mohammad Ashraf, Nasim Akhtar, Firdous Tahira and Faiz-ul-Hassan Nasim
Pakistan Journal of Biological Sciences 2 ( 4 ): 1594 - 1597 , 1999
Mohammad Ashraf, Faiz-ul-Hassan Nasim and Mohammad Munir Hussain
Pakistan Journal of Biological Sciences 4 ( 2 ): 121 - 123 , 2001