Nhan N T H, Hon N V and Preston T R 2010 Studies on ensiling of Tithonia diversifolia  and Taro (Colocasia esculenta) and feeding the silage to fattening pigs as partial replacment of a basal diet of rice bran, broken rice, soybean meal and fish meal.  International Conference on Livestock, Climate Change and Resource Depletion (Editor: Reg Preston),  Champasack University, Pakse, LAO PDR, 9-11 November 2010.  http://www.mekarn.org/workshops/pakse/html/nhan.htm