Pakamas Choosit, Chuchai Sujivarakul and Sak Kongsuwan
Research Journal of Applied Sciences 6 ( 7 ): 427 - 432 , 2011
Phanudej Kudngaongarm and Chuchai Sujivarakul
Research Journal of Applied Sciences 6 ( 7 ): 433 - 438 , 2011