Khuc Thi Hue, Do Thi Thanh Van  and Inger Ledin 2007 Effect of supplementing urea treated rice straw and molasses with different forage species on the performance of lambs.    Proceedings MEKARN Regional Conference 2007: Matching Livestock Systems with Available Resources (Editors: Reg Preston and Brian Ogle), Halong Bay, Vietnam, 25-28 November 2007 http://www.mekarn.org/prohan/hue.htm