1. Key world energy statistics 2012;International Energy Agency,2012
2. Balance nacional de energía 2011;Secretaría de Energía de México,2012
3. The economics of climate change: the Stern review;Stern(Great Britain. Treasury),2006
4. CO2 emissions from fuel combustion highlights 2011;International Energy Agency,2009
5. Kyoto protocol to the United Nations framework convention on climate change;United Nations Framework Convention on Climate Change,1998