Duong Nguyen Khang and Preston T R 2008 Effects of  diet preparation and improved physical environment  on milk production and physiological  parameters of dairy cattle.  Proceedings MEKARN Regional Conference 2007: Matching Livestock Systems with Available Resources (Editors: Reg Preston and Brian Ogle), Halong Bay, Vietnam, 25-28 November 2007 http://www.mekarn.org/prohan/khang1.htm