1. Environmental Protection Agency (EPA), United States, http://www.epa.gov/climatechange/ghgemissions/global.html#two, 2014
2. International Energy Agency (IEA), Key World Energy Statistics, 2013. International Energy Agency (IEA), http://www.worldenergyoutlook.org/media/weowebsite/2014/weio/WEIO2014FactSheet3Power.pdf.
3. THORNTON, D.V. and MEYER, K.H.. Proceedings of 2000 International Joint Power Generation Conference, Florida, July 2000
4. OAKEY, J.E., PINDER, L.W., VANSTONE, R., HENDERSON, M., OSGERBY, S. Department of Trade and Industry’s Cleaner Coal Technology Transfer Programme Report, 2003.
5. HONGYAO, Y., CHENGYU, C., JIANXIN D., et aL. Journal of University of Science and Technology Beijing, 2010, 32(7): 877–882