• Ichnogenus Trypanites in the Ordovician of Estonia (Baltica)Toom, Ursula; Kuva, Jukka; Knaust, DirkEstonian journal of earth sciences2023 / p. 106-109 : ill https://doi.org/10.3176/earth.2023.48 https://www.scopus.com/sourceid/6000195392 https://www.scopus.com/record/display.uri?eid=2-s2.0-85168486216&origin=inward&txGid=06de5a539449ce5a7be742995a4f5e3f https://jcr.clarivate.com/jcr-jp/journal-profile?journal=EST%20J%20EARTH%20SCI&year=2023 https://www.webofscience.com/wos/woscc/full-record/WOS:001015399200012
• Micro-coprolites inside Ordovician body fossils from EstoniaToom, Ursula; Isakar, Mare; Hints, Olle; Madison, A.; Vinn, Olev13th International Symposium on the Ordovician System : Novosibirsk, Russia (July 19-22, 2019) : contributions2019 / p. 211-213 : ill http://www.igcp653.org/wp-content/uploads/2019/07/ISOS13Proceedings.pdf
• Ordovician and Silurian ichnofossils from carbonate facies in Estonia: A collection-based reviewToom, Ursula; Vinn, Olev; Hints, OllePalaeoworld2019 / p. 123-144 : ill https://doi.org/10.1016/j.palwor.2018.07.001 https://www.scopus.com/sourceid/4700151602 https://www.scopus.com/record/display.uri?eid=2-s2.0-85052932064&origin=inward&txGid=3ce35692d7e97ee511def3f64d50a29f https://jcr.clarivate.com/jcr-jp/journal-profile?journal=PALAEOWORLD&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000463600800012