Nguyen Thi Hoa Ly  2005 Effect of supplementation of l-lysine and dl-methionine on the utilization of diets containing ensiled cassava leaves as a protein source for pigs in central Vietnam. .  Workshop-seminar "Making better  use of local feed resources" (Editors: Reg Preston and Brian Ogle) MEKARN-CTU, Cantho, 23-25 May, 2005. Article #24. RetrievedJuly 17, 109, from http://www.mekarn.org/proctu/hoal36.htm