Mai Van Sanh 2005 Effects of supplementation on feed intake, working capacity and body weight change of swamp buffaloes in a grazing system.  Workshop-seminar "Making better  use of local feed resources" (Editors: Reg Preston and Brian Ogle) MEKARN-CTU, Cantho, 23-25 May, 2005. Article #19. Retrieved, from http://www.mekarn.org/proctu/sahn19.htm