B.Saleem, F.Ilyas, S. Ali, M.J. Qureshi and I.A.Malik
Pakistan Journal of Biological Sciences 1 ( 2 ): 120 - 123 , 1998
A. Hussain, M. E. Babar, S. Ali and Zia-ul-Hasan
Pakistan Journal of Biological Sciences 3 ( 1 ): 179 - 180 , 2000