Muhammad Hassan and Muhammad Javed
Pakistan Journal of Biological Sciences 2 ( 4 ): 1564 - 1568 , 1999
Muhammad Hassan and Muhammad Javed
Pakistan Journal of Biological Sciences 2 ( 4 ): 1620 - 1622 , 1999
Pakistan Journal of Biological Sciences 4 ( 5 ): 559 - 561 , 2001
Muhammad Hassan, M. Javed and G. Mahmood
Pakistan Journal of Biological Sciences 3 ( 12 ): 2171 - 2175 , 2000