Mohd Ekhwan Toriman, Norbaya Hashim, Abd. Jalil Hassan, Mazlin Mokhtar, Hafizan Juahir, Muhamad Barzani Gasim and Md Pauzi Abdullah
Asian Journal of Scientific Research 4 ( 2 ): 129 - 138 , 2011
Muhammad Barzani Gasim, Mohd Ekhwan Toriman and Hafizan Juahir
Journal of Applied Sciences 15 ( 3 ): 545 - 551 , 2015