1. on Climate Change, I.P., 2007. Fourth Assessment Report: Climate Change 2007: The AR4 Synthesis Report. Geneva: IPCC.
2. Protocol, K., 2007. United Nations, Framework Convention on Climate Change. In: Kyoto Protocol to the United Nations Framework Convention on Climate Change. UNFCCC Secretariat.
3. Nordhaus, W., 2007. The challenge of global warming: Economic models and environmental policy. New Haven, CT: Yale University.
4. Birol, F., 2007.World energy outlook 2006. Paris: International Energy Agency.
5. Agency, I.E., 2006. CO2 Emissions from Fuel Combustion: 1971–2004. Source OECD Energy 2006.