1. BP, 2004. Statistical Review of World Energy 〈http://www.bp.com/statisticalreview2004〉.
2. Decarbonizing the global energy system;Grübler;Technological Forecasting and Social Change,1996
3. Intergovernmental Panel on Climate Change (IPCC), 1996. Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories. Greenhouse Gas Inventory Reference Manual, vol. III. IPCC/OECD/IEA.
4. Intergovernmental Panel on Climate Change (IPCC), 2001. Climate Change 2001: Synthesis Report. Glossary. Cambridge University Press, Cambridge, UK and New York, NY, 〈http://www.ipcc.ch/pub/syrgloss.pdf〉.
5. Electricity and Heat Annual Questionnaire, Documentation, Methodology for Apportioning Fuel Input in a CHP Plant,2005