1. Global warming of 1.5 °C. An IPCC special Report;IPCC. The Intergovernmental Panel on Climate Change,2018
2. Greenhouse gas removal. Report;The Royal Society and Royal Academy of Engineering,2018
3. World Energy Outlook 2018;International Energy Agency (IEA),2018
4. Carbon capture and storage: the solution for deep emissions reductions;International Energy Agency (IEA),2015
5. Underground coal gasification: a brief review of current status;Shafirovich;Ind Eng Chem Res,2009