1. ECX (2008). European Climate Exchange Historical data-EXC CFI Futures Contract at http://www.ecxeurope.com/default_flash.asp.(verified 8February 2008).
2. Food and agriculture organization of the united nations, fao bulletin of statistics, vol.1, no1. (2000) 83-89.
3. Food and agriculture organization of the united nations, fao bulletin of statistics, vol.4, no2. (2003) 159-165.
4. IPCC (2006). 2006 IPCC Guidelines for National Greenhouse Gas Inventories Vol. 4, Agriculture, Forestry and Other Land Use, Chapter 10 ‘Emissions From Livestock and Manure Management. Available at http://www.ipcc-ggip.iges.or.jp/public/2006gl/vol4.htm.(verified 15 June 2007).
5. Kaku, K. & Ikeguchi, A (2008). Approximation of baselines and greenhouse gas reduction scenario for small-scale Clean Development Mechanism on agriculture and livestock in ASEAN Australian Journal of Experimental Agriculture. 48 (2008) 248-250.