- CO2 mineralisation : concept for co-utilization of oil shale energetics waste streams in CaCO3 productionVelts, Olga; Uibu, Mai; Kallas, Juha; Kuusik, Rein, keemikEnergy procedia2013 / p. 5921-5928 : ill https://www.sciencedirect.com/science/article/pii/S1876610213007613 https://doi.org/10.1016/j.egypro.2013.06.518 https://www.scopus.com/sourceid/17700156736 https://www.scopus.com/record/display.uri?eid=2-s2.0-84898720725&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.1016%2Fj.egypro.2013.06.518%29&sessionSearchId=45109fc468f65f7960967c9a10ed35d7 https://www.webofscience.com/wos/woscc/full-record/WOS:000345500506020
- From waste to value : CaCO3 crystallization on the basis of waste oil shale ashVelts, Olga; Uibu, Mai; Kallas, Juha; Kuusik, Rein, keemikProceedings of the Air & Waste Management Association’s (A&WMA) 105th Annual Conference & Exhibition2012 / [10] p. : ill