Duong Nguyen Khang and Preston T R 2005 Effect of association of Flemingia (Flemingia macrophylla) on chemical composition of cassava foliage, total yield of foliage and yield of cassava roots Workshop-seminar "Making better  use of local feed resources" (Editors: Reg Preston and Brian Ogle) MEKARN-CTU, Cantho, 23-25 May, 2005. Article #6a. Retrieved, from http://www.mekarn.org/proctu/khan6a.htm