Organic and carbon aerogels containing rare-earth metals : their properties and application as catalystsKreek, Kristiina; Kriis, Kadri; Maaten, Birgit; Uibu, Mai; Mere, Arvo; Kanger, Tõnis; Koel, MihkelJournal of non-crystalline solids2014 / p. 43-48 : ill Preparation of metal-doped carbon aerogels from oil shale processing by-productsKreek, Kristiina; Kulp, Maria; Uibu, Mai; Mere, Arvo; Koel, MihkelOil shale2014 / p. 185-194 : ill https://artiklid.elnet.ee/record=b2673721*est