Shafiullah, S. Asad, M.A. Rana, Baitullah, A.S. Khan and M.A. Malik
Pakistan Journal of Biological Sciences 3 ( 2 ): 345 - 347 , 2000
S.A. Kakakhel, N. Islam, M. Amjad and M.A. Malik
Pakistan Journal of Biological Sciences 3 ( 4 ): 669 - 671 , 2000