• On endomorphisms of groups of order 36Leibak, Alar; Puusemp, PeeterProceedings of the Estonian Academy of Sciences2016 / p. 237-254 https://doi.org/10.3176/proc.2016.3.06 https://artiklid.elnet.ee/record=b2798395*est https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-84985911230&origin=inward&txGid=479114b7d6fe995ee6527d159a943ea0 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2016 https://www.webofscience.com/wos/woscc/full-record/WOS:000383313700005