1. World energy outlook;IEA,2010
2. WCA. Coal price. World Coal Association [cited 28th April 2014]. Available from: 〈http://www.worldcoal.org/coal/market-amp-transportation/coal-price/〉; 2014.
3. BP. Statistical review of world energy 2013. [cited 10th September 2013]. Available from: 〈http://www.bp.com/en/global/corporate/about-bp/statistical-review-of-world-energy-2013.html〉; 2013.
4. WCA. Coal and electricity. [cited 28th April 2014]. Available from: 〈http://www.worldcoal.org/coal/uses-of-coal/coal-electricity/〉; 2014.
5. EIA. International Energy Outlook 2013, Industrial sector energy consumption. U.S. Energy Information Admistration; 2014 [cited 28th April 2014]. Available from: 〈http://www.eia.gov/forecasts/ieo/industrial.cfm〉.