Tran Quoc Viet and Dao Duc Kien 2005: Effects of supplementation of cassava hay as a high protein feed source to the rice straw ration and Vong nem (Erythrina senegalensis) leaves as herbal medicine against helminths on growth rate and feed utilization efficiency of local beef cattle under household conditions.   Workshop-seminar "Making better  use of local feed resources" (Editors: Reg Preston and Brian Ogle) MEKARN-CTU, Cantho, 23-25 May, 2005. Article #16. Retrieved, from http://www.mekarn.org/proctu/viet16.htm