Nguyen Thi Kim Dong and Nguyen Van Thu 2008 Effect of dietary fiber sources on feed intake, nutrient digestibility and growth rate of growing rabbits fed water spinach or sweet potato vines with or without supplement of Wedelia trilobata and Hymenache acutigluma.  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/kdong2.htm