Radionuclide concentration variations in the fuel and residues of oil shale-fired power plants : estimations of the radiological characteristics over a 2-year periodVaasma, Taavi; Loosaar, Jüri; Kiisk, Madis; Tkaczyk, Alan HenryJournal of environmental radioactivity2017 / p. 25-33 : ill https://doi.org/10.1016/j.jenvrad.2016.10.005 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS The enrichment behavior of natural radionuclides in pulverized oil shale-fired power plantsVaasma, Taavi; Kiisk, Madis; Meriste, Tõnis; Tkaczyk, Alan HenryJournal of environmental radioactivity2014 / p. 427-433 : ill https://doi.org/10.1016/j.jenvrad.2014.02.027 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS