1. Intergovernmental Panel on Climate Change (IPCC), 2007. IPCC Fourth Assessment Report, the Physical Science Basis. http://www.ipcc.ch/ipccreports/ar4-wg1.htm (accessed May 2013.).
2. LuAnn Dahlman. Climate Change: Global Temperature. https://www.climate.gov/news-features/understanding-climate/climate-change-global-temperature (accessed June 2016.).
3. Billiard F. Refrigerating equipment, energy efficiency and refrigerants. Bulletin of the IIR [2005-1]; 2005.
4. Estrada-Flores S. Chain of thought [Vol. 1, No. 2, April 2008]. http://www.food-chain.com.au/FCI_enews2.pdf; 2008.
5. AEA Technology. The validity of food miles as an indicator of sustainable development – Final report for DEFRA. Didcot: AEA Technology, UK; 2005.