Nguyen Ba Mui and Dang Thai Hai   2009  Utilization of agricultural by-products in pig feeding, its effect on nitrogen digestibility, nitrogen excretion and nitrogen losses from slurry during storage. (Editors: Reg Preston and Brian Ogle) International Conference on Livestock, Climate Change and the Environment, An Giang University, Vietnam, 16-18 October 2009. httm://www.mekarn.org/workshops/environ/proenv/mui_hau.htm