Nguyen Nhut Xuan Dung, Luu Huu Manh and Brian Ogle 2005: Effects of fermented liquid feeds on the performance, digestibility, nitrogen retention and plasma urea nitrogen (PUN) of growing-finishing pigs. Workshop-seminar "Making better  use of local feed resources" (Editors: Reg Preston and Brian Ogle) MEKARN-CTU, Cantho, 23-25 May, 2005. Article #29. Retrieved, from http://www.mekarn.org/proctu/xdun.htm