Nguyen Thi Hoa Ly, Tran Thanh Hai and  Preston T R  2010 Ensiled taro (Colocasia esculenta)  and cassava  (Manihot esculenta Crantz) leaves as protein sources in diets for pigs  in the upland conditions in  Central Vietnam.  (Editor: Reg Preston) International Conference on Livestock, Climate Change and Resource Depletion, Champasack University, Pakse, LAO PDR, 9-11 November 2010 . http://www.mekarn.org/workshops/pakse/html/hoaly.htm