Khan Farmanullah, Koichi Sato and Keiji Takase
Pakistan Journal of Biological Sciences 1 ( 4 ): 244 - 247 , 1998
Khan Farmanullah, A.U. Bhatti, S.A. Rizvi and S. Perveen
Pakistan Journal of Biological Sciences 2 ( 1 ): 174 - 177 , 1999