1. IPCC Special Reports on Carbon Dioxide Capture and Storage; Intergovermental Panel of Climate Change. Cambridge, Uinated Kingdom and New York, USA: Cambridge University Press; 2005.
2. Oil Shale Fuel Combustion;Ots,2006
3. Eesti Energia Environmental report 2011, https://www.energia.ee/-/doc/10187/pdf/concern/keskkonnaaruanna_2011_eng.pdf Accessed 3 Oct 2012.
4. Reduction of CO2 emissions by carbonation of alkaline wastewater;Uibu;Air Pollution XVI. WIT Transactions on Ecology and the Environment,2008
5. Developments of CO2 mineral carbonation of oil shale ash;Uibu;J Harzard Mater,2010