M.S. Arifianto, A. Chekima, M.Y. Hamid, L. Barukang and D.V. Viswacheda
Journal of Applied Sciences 7 ( 15 ): 2146 - 2153 , 2007
D.V. Viswacheda, L. Barukang, M.Y. Hamid and M.S. Arifianto
Journal of Applied Sciences 7 ( 15 ): 2111 - 2119 , 2007