1. BP Statistical review of world energy. London: BP; June 2013.
2. WorldBank. World Bank open data—India. Available from: 〈http://data.worldbank.org/country/india〉 2014 [retrieved 20.05.14].
3. WorldBank. World Bank open data—China. 2014. Available from: 〈http://data.worldbank.org/country/china〉; 2014 [retrieved 20.05.14].
4. Global coal risk assessment: data analysis and market research;Yang,2012
5. I=PAT;Schulze;Ecol Econ,2002