• Assessing hydrochemical interactions between humic-rich stream and shallow karst aquifer using natural tracers (Tuhala karst system, N Estonia) [Online resource]Koit, Oliver; Barbera, Juan; Kiivit, Iti-Kärt; Martma, TõnuThe European bi-annual conference on the hydrogeology of Karst and carbonate reservoirs : 2-6 Jul 2018, Besancon, France2018 / p. 100 http://www.eurokarst.org/wp-content/uploads/2016/07/Proceedings_Eurokarst2018.pdf
• Nitrate dynamics and its connection to seasonal groundwater recharge inkarst springs of the Sõmeru River catchment, Northern EstoniaPärn, Joonas; Walraevens, Kristine; van Camp, M.; Koit, Oliver; Ivask, Jüri; Babre, Alise; Mažeika, Jonas; Hunt, Malle; Osjamets, M.; Iital, Arvo; Kõrgmaa, Vallo; Raidla, Valle; Aeschbach, W.; Vaikmäe, ReinXXXI NORDIC HYDROLOGICAL CONFERENCE 2022, August 15–18, Tallinn, Estonia : abstracts2022 / 2 p https://drive.google.com/file/d/1L-CvqmUu1FT8XafXma527iw4t5gAFn2n/view https://konverentsikeskus.tlu.ee/sites/konverentsikeskus/files/Konverentsid/NHC2020/List%20of%20Presentations%20NHC2022_08Aug2022.pdf
• Spatiotemporal assessment of humic substance-rich stream and shallow karst aquifer interactions in a boreal catchment of northern EstoniaKoit, Oliver; Barbera, Juan Antonio; Marandi, Andres; Terasmaa, Jaanus; Kiivit, Iti-Kärt; Martma, TõnuJournal of hydrology2020 / art. 124238, 18 p. : ill https://doi.org/10.1016/j.jhydrol.2019.124238 https://www.scopus.com/sourceid/50089 https://www.scopus.com/record/display.uri?eid=2-s2.0-85074169746&origin=inward&txGid=2e418c7eb1a5b6caf7b7313c102c49f6 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=J%20HYDROL&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000509620900020
• Unveiling the hydrological response of NO3-rich springs to seasonal snowmelt in a karstic carbonate uplandPärn, Joonas; Walraevens, Kristine; Hunt, Marlen; Koit, Oliver; Van Camp, Marc; Ivask, Jüri; Raidla, Valle; Iital, Arvo; Kõrgmaa, Vallo; Vaikmäe, ReinJournal of hydrology2024 / art. 131724 https://doi.org/10.1016/j.jhydrol.2024.131724