Wanapat M,  Poungchompu  O,  Wora-anu S and  Wachirapakorn C 2005: Effect of two different inoculants and roughage sources on ruminal volatile fatty acids, and gas production using modified in vitro gas technique.  Workshop-seminar "Making better  use of local feed resources" (Editors: Reg Preston and Brian Ogle) MEKARN-CTU, Cantho, 23-25 May, 2005. Article #24b. Retrieved, from http://www.mekarn.org/proctu/wana24b.htm