• Assessment of the economic regulation of network industries : oil shale value chain in EstoniaUukkivi, Raigo; Koppel, OttOil shale2020 / p. 158-176 : ill https://doi.org/10.3176/oil.2020.2.05 https://www.scopus.com/sourceid/17080 https://www.scopus.com/record/display.uri?eid=2-s2.0-85085254757&origin=inward&txGid=e97c5d9f0132eb4a09c589e9f366d01a https://jcr.clarivate.com/jcr-jp/journal-profile?journal=OIL%20SHALE&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000535700200005
• A concept for performance measurement and evaluation in network industriesKuhi, Kristjan; Kõrbe Kaare, Kati; Koppel, OttProceedings of the Estonian Academy of Sciences2015 / p. 536-542 : ill https://artiklid.elnet.ee/record=b2750881*est https://doi.org/10.3176/proc.2015.4S.01 https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-84954477980&origin=inward&txGid=d6abdd70555c96c1b73ca2e6e6ff4b50 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2015 https://www.webofscience.com/wos/woscc/full-record/WOS:000369549400002
• Economic regulation assessment of network industries : railway infrastructure management in Estonia [Electronic resource]Uukkivi, Raigo; Koppel, OttEstonian discussions on economic policy = Estnische Gespräche über Wirtschaftspolitik = Eesti majanduspoliitilised väitlused. 26 (1-2)2018 / p. 155-171 [CD-ROM]
• Performance measurement in network industries : example of power distribution and road networksKuhi, Kristjan; Kõrbe Kaare, Kati; Koppel, OttProceedings of the 9th International Conference of DAAAM Baltic Industrial Engineering, 24-26th April 2014, Tallinn, Estonia2014 / p. 115-120 : ill