• Causes of indefinite faults in Estonian 110 kV overhead power gridTaklaja, Paul; Oidram, Rein; Niitsoo, Jaan; Palu, IvoOil shale2013 / p. 225-243 : ill https://artiklid.elnet.ee/record=b2631741*est
• Main bird excrement contamination type causing insulator flashovers in 110 kV overhead power lines in EstoniaTaklaja, Paul; Oidram, Rein; Niitsoo, Jaan; Palu, IvoOil shale2013 / p. 211-224 : ill https://artiklid.elnet.ee/record=b2631738*est https://doi.org/10.3176/oil.2013.2S.03 https://www.scopus.com/sourceid/17080 https://www.scopus.com/record/display.uri?eid=2-s2.0-84879181793&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.3176%2Foil.2013.2S.03%29&sessionSearchId=a6a9a3b6ef7339347899f2ad4e915514&relpos=0 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=OIL%20SHALE&year=2013 https://www.webofscience.com/wos/woscc/full-record/WOS:000320580200003
• 110 kV õhuliinide isolatsiooni töökindluse analüüs ja töökindluse tõstmise meetodid = The study of 110 kV power grid reliability and the measures to decrease insulation failureTaklaja, Paul2012 http://www.ester.ee/record=b2857612*est