A.B. Nasrin, A.N. Ma, Y.M. Choo, S. Mohamad, M.H. Rohaya, A. Azali and Z. Zainal
American Journal of Applied Sciences 5 ( 3 ): 179 - 183 , 2008
S. Vijaya, A.N. Ma and Y.M. Choo
American Journal of Environmental Sciences 5 ( 3 ): 267 - 272 , 2009