• Analysis of cyclic sulfur mustard degradation products in water samples by HPLC and CELees, Heidi; Avarlaid, Annela; Vaher, Merike; Kaljurand, Mihkel20th International Scientific Conference EcoBalt 2016 : Tartu, Estonia, October 9-12 : book of abstracts2016 / p. 75 : ill http://akki.ut.ee/wp-content/uploads/2015/01/Abstracts_Book_EcoBalt_2016.pdf
• Analysis of sulfur mustard hydrolysis and oxidation products in seawater and sediments by capillary electrophoresisLees, Heidi; Jõul, Piia; Vaher, Merike; Kuhtinskaja, Maria; Kaljurand, MihkelScience for the Environment 2015 : Aarhus, Denmark, 1-2 October : [abstracts]2015 / [1] p http://dce-conference.au.dk/abstracts/
• Analysis of thiodiglycol and its oxidation products in sediments by capillary electrophoresisLees, Heidi; Vaher, Merike; Kaljurand, MihkelITP2015/NoSSS2015 : final program and book of abstracts2015 / p. P-55
• Characterization and enhancement of oil shale fly ash from CFB boilerPikkor, Heliis; Järvik, Oliver; Lees, Heidi; Konist, Alar; Siirde, Andres; Maaten, Birgit6th International Conference on Smart and Sustainable Technologies, SpliTech 20212021 / p. 1-4 https://doi.org/10.23919/SpliTech52315.2021.9566470
• 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
• Chemical analysis of dumped chemical warfare agents during the MODUM projectSöderström, Martin; Östin, Anders; Vaher, Merike; Jõul, Piia; Lees, Heidi; Kaljurand, MihkelTowards the monitoring of dumped munitions threat (MODUM) : a study of chemical munitions dumpsites in the Baltic Sea2018 / p. 71-103 https://doi.org/10.1007/978-94-024-1153-9_4 https://www.scopus.com/sourceid/19700188432 https://www.scopus.com/record/display.uri?eid=2-s2.0-85030100958&origin=inward&txGid=f63947dde9b21d346c3f2633fae42983 https://www.webofscience.com/wos/woscc/full-record/WOS:000433888800005
• Comparison of the ecotoxic properties of oil shale industry by-products to those of coal ashLees, Heidi; Järvik, Oliver; Konist, Alar; Siirde, Andres; Maaten, BirgitOil shale2022 / p. 1-19 : tab https://doi.org/10.3176/oil.2022.1.01 https://www.scopus.com/sourceid/17080 https://www.scopus.com/record/display.uri?eid=2-s2.0-85125309588&origin=inward&txGid=ba523e0b5788502fbca186dda289828a https://jcr.clarivate.com/jcr-jp/journal-profile?journal=OIL%20SHALE&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000760803100001
• Computational results of the ecotoxic analysis of fly and bottom ash from oil shale power plants and shale oil production facilitiesLees, Heidi; Järvik, Oliver; Konist, Alar; Siirde, Andres; Maaten, BirgitChemical engineering transactions2020 / p. 967-972 https://doi.org/0.3303/CET2081162 https://www.scopus.com/record/display.uri?eid=2-s2.0-85092033034&origin=inward&txGid=0c1c7fc07fcc8f2767255413a47fc58b https://www.scopus.com/sourceid/19600161818 https://www.scopus.com/record/display.uri?eid=2-s2.0-85092033034&origin=inward&txGid=c25655b1f152d8d7f90579ec536198eb
• Current status of co-pyrolysis of oil shale and biomassLyons Ceron, Alejandro; Konist, Alar; Lees, Heidi; Järvik, OliverOil shale2021 / p. 228-263 : tab https://doi.org/10.3176/oil.2021.3.04 https://www.scopus.com/sourceid/17080 https://www.scopus.com/record/display.uri?eid=2-s2.0-85114119499&origin=inward&txGid=4e3ff0cf5105d431c1afc84f4d47ac32 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=OIL%20SHALE&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000685560600004
• Detection of banned chemicals in various matrices (saliva, sediments) by capillary electrophoresisKaljurand, Mihkel; Mazina-Šinkar, Jekaterina; Saar-Reismaa, Piret; Jõul, Piia; Lees, Heidi; Tretjakova, Anastassia; Kulp, Maria; Vaher, Merike20th International Scientific Conference EcoBalt 2016 : Tartu, Estonia, October 9-12 : book of abstracts2016 / p. 38 http://akki.ut.ee/wp-content/uploads/2015/01/Abstracts_Book_EcoBalt_2016.pdf
• Detection of banned chemicals in various matrices (saliva, sediments) by capillary electrophoresisKaljurand, Mihkel; Mazina, Jekaterina; Saar-Reismaa, Piret; Jõul, Piia; Lees, Heidi; Špiljova, Anastassija; Kulp, Maria; Vaher, MerikeITP2015/NoSSS2015 : final program and book of abstracts2015 / p. L-36
• Development and comparison of HPLC and MEKC methods for the analysis of cyclic sulfur mustard degradation productsLees, Heidi; Vaher, Merike; Kaljurand, MihkelElectrophoresis2017 / p. 1075-1082 : ill https://doi.org/10.1002/elps.201600418 https://www.scopus.com/sourceid/23524 https://www.scopus.com/record/display.uri?eid=2-s2.0-85011588824&origin=inward&txGid=bb91fdf9a76a06b59ba7d56374848ebe https://jcr.clarivate.com/jcr-jp/journal-profile?journal=ELECTROPHORESIS&year=2017 https://www.webofscience.com/wos/woscc/full-record/WOS:000399693800014
• Development of a capillary electrophoresis method with direct UV detection for the analysis of thiodiglycol and its oxidation productsJõul, Piia; Lees, Heidi; Vaher, Merike; Kobrin, Eeva-Gerda; Kaljurand, Mihkel; Kuhtinskaja, MariaElectrophoresis2015 / p. 1202-1207 : ill http://dx.doi.org/10.1002/elps.201500038
• Development of analysis methods to detect the use of explosives and chemical warfare agents = Analüüsimetoodikate arendamine keemiarelva- ja lõhkeainete kasutamise tuvastamiseksLees, Heidi2018 https://digi.lib.ttu.ee/i/?10379 https://www.ester.ee/record=b5148514*est
• Development of HPLC and MEKC methods for the analysis of sulfur mustard cyclic degradation productsLees, Heidi; Kaljurand, Mihkel; Vaher, Merike40th International Symposium on Capillary Chromatography and 13th GC×GC Symposium : May 29 - June 03, 2016, Riva del Garda Fierecongressi, Riva del Garda, Italy : abstract book2016 / p. 255
• 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
• Effect of woody biomass gasification process conditions on the composition of the producer gasLyons Cerón, Alejandro; Konist, Alar; Lees, Heidi; Järvik, OliverSustainability2021 / art. 11763, 17 p. : ill https://doi.org/10.3390/su132111763 https://www.scopus.com/sourceid/21100240100 https://www.scopus.com/record/display.uri?eid=2-s2.0-85118213131&origin=inward&txGid=a0fd041cc5f74ee9392ae728667702d0 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=SUSTAINABILITY-BASEL&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000719309600001
• Fingerprinting postblast explosive residues by portable capillary electrophoresis with contactless conductivity detectionKobrin, Eeva-Gerda; Lees, Heidi; Fomitšenko, Maria; Kuban, Petr; Kaljurand, MihkelElectrophoresis2014 / p. 1165-1172 : ill https://doi.org/10.1002/elps.201300380 https://www.scopus.com/sourceid/23524 https://www.scopus.com/record/display.uri?eid=2-s2.0-84898046817&origin=inward&txGid=3bfb0f84ccb71cc7c53358a32fb0a998 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=ELECTROPHORESIS&year=2014 https://www.webofscience.com/wos/woscc/full-record/WOS:000334126600012
• Heidi Lees ja Piia Jõul. Oht merepõhjas - keemiarelvadLees, Heidi; Jõul, PiiaTeadus kolme minutiga : 2015-20162017 / lk. [60]-63 : ill http://www.ester.ee/record=b4654069*est
• Investigation of the adsorption and desorption of sulfur mustard degradation products in sediments by capillary electrophoresis [Online resource]Lees, Heidi; Vaher, Merike; Kaljurand, MihkelCECE 2016 : 13th International Interdisciplinary Meeting on Bioanalysis : October 17-19, 2016, Hotel Continental, Brno, Czech Republic : [proceedings]2016 / p. 182-185 : ill http://www.ce-ce.org/CECE2016/Proceedings%20CECE%202016_WOS.pdf
• Preparation and characterization of lignin-derived carbon aerogelsJõul, Piia; Järvik, Oliver; Lees, Heidi; Kallavus, Urve; Koel, Mihkel; Lukk, TiitFrontiers in chemistry2023 / art. 1326454 https://doi.org/10.3389/fchem.2023.1326454 https://www.scopus.com/sourceid/21100461983 https://www.scopus.com/record/display.uri?eid=2-s2.0-85182626298&origin=inward&txGid=e4d05ebf658ca822a8248b757d66ecdc https://jcr.clarivate.com/jcr-jp/journal-profile?journal=FRONT%20CHEM&year=2023 https://www.webofscience.com/wos/woscc/full-record/WOS:001147742600001
• Separation of perfluoroalkyl substances by using nonaqueous capillary electrophoresis with conductivity detectionLees, Heidi; Jõul, Piia; Siilak, Kristel; Vaher, MerikeSeparation science plus2020 / p. 313-320 https://doi.org/10.1002/sscp.202000016 https://www.scopus.com/sourceid/21101133224 https://www.scopus.com/record/display.uri?eid=2-s2.0-85128173432&origin=inward&txGid=322a1158bca2f9fa3f64d1663f80e6a4 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=SEP%20SCI%20PLUS&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000530739000001
• Simple multispectral imaging approach for determining the transfer of explosive residues in consecutive fingerprintsLees, Heidi; Zapata, Félix; Vaher, Merike; García-Ruiz, CarmenTalanta2018 / p. 437-445 : ill https://doi.org/10.1016/j.talanta.2018.02.079 https://www.scopus.com/sourceid/24555 https://www.scopus.com/record/display.uri?eid=2-s2.0-85044164364&origin=inward&txGid=9a6a4b896bcf069e3537766fcf25cd15 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=TALANTA&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000432234900056
• Steam activation of oil shale to enhance the porosity of produced semicokePikkor, Heliis; Lees, Heidi; Konist, Alar; Järvik, Oliver; Maaten, BirgitEnergy Sources, Part A : Recovery, Utilization, and Environmental Effects2022 / p. 9064-9073 https://doi.org/10.1080/15567036.2022.2128471 https://www.scopus.com/sourceid/4500151514 https://www.scopus.com/record/display.uri?eid=2-s2.0-85139163161&origin=inward&txGid=5bfc74a1eaaeae40e77a23dee5f96824 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=ENERG%20SOURCE%20PART%20A&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000861649200001
• Study of the adhesion of explosive residues to the finger and transfer to clothing and luggageLees, Heidi; Zapata, Felix; Vaher, Merike; García-Ruiz, CarmenScience & Justice2018 / p. 415-424 https://doi.org/10.1016/j.scijus.2018.07.002 https://www.scopus.com/sourceid/27800 https://www.scopus.com/record/display.uri?eid=2-s2.0-85049851834&origin=inward&txGid=c47c3008054fa19d5062b4ffe54e797a https://jcr.clarivate.com/jcr-jp/journal-profile?journal=SCI%20JUSTICE&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000452578800005
• Surface area of oil shale and its solid pyrolysis products depending on the particle sizePikkor, Heliis; Maaten, Birgit; Baird, Zachariah Steven; Järvik, Oliver; Konist, Alar; Lees, HeidiChemical engineering transactions2020 / p. 961−966 https://doi.org/0.3303/CET2081161 https://www.scopus.com/sourceid/19600161818 https://www.scopus.com/record/display.uri?eid=2-s2.0-85092040065&origin=inward&txGid=c8863b0231097f7e233d33f9fff9e32c
• Surface characterisation of Estonian oil shale semi-cokePikkor, Heliis; Lees, Heidi; Maaten, Birgit; Järvik, Oliver; Konist, AlarChemical engineering transactions2020 / p. 853-858 : ill https://doi.org/0.3303/CET2081143 https://www.scopus.com/sourceid/19600161818 https://www.scopus.com/record/display.uri?eid=2-s2.0-85092026171&origin=inward&txGid=dc9672753a4e2daf1be3b30827100a0e