• Rare arthropod traces from the Ordovician and Silurian of Estonia (Baltica)Vinn, Olev; Toom, UrsulaNeues Jahrbuch für Geologie und Paläontologie2016 / p. 135-141 : ill https://doi.org/10.1127/njgpa/2016/0570 https://www.scopus.com/sourceid/25103 https://www.scopus.com/record/display.uri?eid=2-s2.0-84992432092&origin=inward&txGid=78dcd60e5be995daa5608ea6102acba1 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=NEUES%20JAHRB%20GEOL%20P-A&year=2016 https://www.webofscience.com/wos/woscc/full-record/WOS:000376031300002