Himayatullah Khan, Khalil Ahmad, M. Qasim and M. Ayub
Journal of Biological Sciences 1 ( 2 ): 46 - 48 , 2001
Abdur Rashid, Rahmat Ullah Khan and Himayatullah Khan
Pakistan Journal of Biological Sciences 10 ( 3 ): 511 - 513 , 2007