• Characterization of oil shale kerogen semi-coke and its application to remove chemical pollutants from aqueous solutionsLees, Heidi; Jõul, Piia; Pikkor, Heliis; Järvik, Oliver; Mets, Birgit; Konist, AlarOil shale2023 / p. 115-132 : ill https://doi.org/10.3176/oil.2023.2.02 https://www.scopus.com/sourceid/17080 https://www.scopus.com/record/display.uri?eid=2-s2.0-85163091047&origin=inward&txGid=86c90fe445512ef1a3beabd8dcc7c567 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=OIL%20SHALE&year=2023 https://www.webofscience.com/wos/woscc/full-record/WOS:000985171900002
• Effect of steam activation on oil shale semi-coke surface propertiesPikkor, Heliis; Konist, Alar; Maaten, Birgit; Järvik, Oliver; Lees, HeidiInternational Multidisciplinary Conference on Computer and Energy Science (SpliTech)2021 / 5 p https://doi.org/10.23919/SpliTech52315.2021.9566397
• Environmental risks and problems of the optimal management of an oil shale semi-coke and ash landfill in Kohtla-Järve, EstoniaVallner, Leo; Gavrilova, Olga; Vilu, RaivoScience of the total environment2015 / p. 400-415 : ill https://doi.org/10.1016/j.scitotenv.2015.03.130 https://www.scopus.com/sourceid/25349 https://www.scopus.com/record/display.uri?eid=2-s2.0-84929485055&origin=inward&txGid=2e1c70fb8408d9e3e5dc1f8351529fe0 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=SCI%20TOTAL%20ENVIRON&year=2015 https://www.webofscience.com/wos/woscc/full-record/WOS:000355010400041
• Soil invertebrates in semi-coke heaps of Estonian oil shale industryKalda, Kai; Ivask, Mari; Kutti, Sander; Kuu, Annely; Meriste, Mart; Nei, Lembit; Peda, Jane; Raukas, AntoOil shale2015 / p. 82-97 : ill https://artiklid.elnet.ee/record=b2716302*est https://doi.org/10.3176/oil.2015.1.06 https://www.scopus.com/sourceid/17080 https://www.scopus.com/record/display.uri?eid=2-s2.0-84924256071&origin=inward&txGid=d65b66fa3d45c0ebdd85a2a91faf32c7 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=OIL%20SHALE&year=2015 https://www.webofscience.com/wos/woscc/full-record/WOS:000351327400006