A.O. Alabi, M.E. Toriman, Mushrifah Idris, M. Shuhaimi-Othman, Nor Rohaizah Jamil, S.A. Sharifah Mastura, Mohd Talib Latif, Muhammad Shafiq Ruslan, Nur Amelia Abas, Nor Azlina Abdul Aziz and Lee Qiao Yun
Journal of Engineering and Applied Sciences 6 ( 6 ): 416 - 422 , 2011