Abatement of CO2 emissions in Estonian oil shale-based power productionUibu, Mai2008 https://digi.lib.ttu.ee/i/?291 https://www.ester.ee/record=b2449493*est Experimental and modeling studies of oil shale oxy-fuel combustion = Põlevkivi hapnikus põletamise eksperimentaalne uurimine ja modelleerimineYörük, Can Rüstü2016 http://www.ester.ee/record=b4619911*est Modification of ammonium nitrate fertilizer = Ammooniumnitraatväetise modifitseerimineKlimova, Irina2014