Hoang Minh Duc, Dinh Phuong Nam, Hoang Minh Son and Pham Hong Ngan 2012 A study on aerobic composting method to manage pig manure on small-scale farms. Proceedings of the International Conference "Livestock-Based Farming Systems, Renewable  Resources and the Environment", 6-9 June 2012, Dalat, Vietnam (Editors: Reg Preston and Sisomphone Southavong) http:/www.mekarn.org/workshops/dalat2012/html/duc.hua.htm