1. Food and Agriculture Organization of the United Nations (FAO). Greenhouse gas emissions from the dairy sector. A life cycle assessment. Rome, Italy; 2010. 94 pp. http://www.fao.org/docrep/012/k7930e/k7930e00.pdf. Confirmed 15 May 2016.
2. Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change;TF Stocker,2013
3. Exploring global changes in nitrogen and phosphorus cycles in agriculture induced by livestock production over the 1900–2050 period;L Bouwman;Proc Nat Acad Sci,2012
4. Interactions and coupling between emissions of methane and nitrous oxide from animal husbandry;GJ Monteny;Nutr Cycl Agroecosys,2001
5. Intergovernmental Panel on Climate Change (IPCC). Guidelines for national greenhouse gas inventories. Agriculture, forestry and other land use. Intergovernmental Panel on Climate Change, vol. 4. IGES, Hayama, Kanagawa, Japan; 2006.