Masood Akhtar, Sultan Ayaz, C.S. Hayat and M. Ashfaque
Pakistan Journal of Biological Sciences 1 ( 4 ): 389 - 391 , 1998
Masood Akhtar, C.S. Hayat, M. Ashfaque, Iftikhar Hussain, Murad Ali Khan and Sultan Ayaz
Pakistan Journal of Biological Sciences 2 ( 2 ): 419 - 421 , 1999