Efforts in oil shale ash indirect carbonation accompanied by PCC-type material formationVelts, Olga; Uibu, Mai; Kallas, Juha; Kuusik, Rein, keemikProceedings of the 4th International Conference on Accelerated Carbonation for Environmental and Materials Engineering : ACEME 2013 : April 9-12, 2013, Leuven, Belgium2013 / p. 341-348 : ill