M. Abdullah, A.F.M. Zain, M.H. Jusoh, N. Misran and W.A. Mubarak
American Journal of Applied Sciences 6 ( 4 ): 685 - 690 , 2009
M. Abdullah, A.F.M. Zain, Y.H. Ho and S. Abdullah
American Journal of Engineering and Applied Sciences 2 ( 1 ): 44 - 49 , 2009