Pb-210 and Po-210 atmospheric releases via fly ash from oil shale-fired power plantsVaasma, Taavi; Loosaar, Jüri; Gyakwaa, Francis; Kiisk, Madis; Özden, Banu; Tkaczyk, Alan HenryEnvironmental pollution2017 / p. 210-218 : ill https://doi.org/10.1016/j.envpol.2016.12.054 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS The enrichment of natural radionuclides in oil shale-fired power plants in Estonia - The impact of new circulating fluidized bed technologyVaasma, Taavi; Kiisk, Madis; Meriste, Tõnis; Tkaczyk, Alan HenryJournal of environmental radioactivity2014 / p. 133-139 : ill https://doi.org/10.1016/j.jenvrad.2014.01.002 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS