• Distribution of conichnus and amphorichnus in the lower paleozoic of Estonia (Baltica)Vinn, Olev; Wilson, Mark A.; Toom, UrsulaCarnets de Geologie2015 / p. 269 - 278 https://doi.org/10.4267/2042/58180
• 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
• Middle Jurassic Zoophycos and Chondrites from the Mélah Formation of Saharan Atlas, AlgeriaMekki, Fayça; Zhang, Li-Jun; Vinn, Olev; Toom, UrsulaEstonian journal of earth sciences2019 / p. 190-198 : ill https://doi.org/10.3176/earth.2019.13 http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2019/issue_4/earth-2019-4-190-198.pdf https://www.scopus.com/sourceid/6000195392 https://www.scopus.com/record/display.uri?eid=2-s2.0-85074116147&origin=inward&txGid=2ada5548a4b6a90686414103c5532e2a https://jcr.clarivate.com/jcr-jp/journal-profile?journal=EST%20J%20EARTH%20SCI&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000505689200002
• Ordovician and Silurian trace fossils of Estonia = Ordoviitsiumi ja Siluri ajastu jäljekivistised EestisToom, Ursula2019 https://digikogu.taltech.ee/et/Item/e8c71b8a-d696-4ef1-aa09-70f6543a5e6f
• Possible drill holes and pseudoborings in obolid shells from the Cambrian/Ordovician boundary beds of Estonia and the uppermost Cambrian of NW RussiaVinn, Olev; Holmer, Lars E.; Wilson, Mark A.; Isakar, Mare; Toom, UrsulaHistorical Biology : An International Journal of Paleobiology2021 / p. 3579-3584 https://doi.org/10.1080/08912963.2021.1878355 https://www.scopus.com/sourceid/13916 https://www.scopus.com/record/display.uri?eid=2-s2.0-85100216254&origin=inward&txGid=2642d491a97f146b95981136bc771bfe https://jcr.clarivate.com/jcr-jp/journal-profile?journal=HIST%20BIOL&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000613380000001
• A review of ichnofossils from Estonian palaeontological collectionsToom, Ursula; Vinn, Olev; Hints, Olle10th Baltic Stratigraphic Conference : Checiny, 12-14 September 2017 : abstracts and field guide2017 / p. 82-83 http://geo.uw.edu.pl/tl_files/publikacje/10th_Baltic_Stratigraphic_Conference_Abstracts_and_Field_Guide.pdf
• The trace fossil Arachnostega in the ordovician of Estonia (Baltica)Vinn, Olev; Wilson, Mark A.; Zatoń, Michał; Toom, UrsulaPalaeontologia electronica2014 / art. 40A, 9 p. : ill https://doi.org/10.26879/477 https://www.scopus.com/sourceid/14002 https://www.scopus.com/record/display.uri?eid=2-s2.0-84911499044&origin=inward&txGid=6fcef8a9e4fda760d04ffeff3d21a38c https://jcr.clarivate.com/jcr-jp/journal-profile?journal=PALAEONTOL%20ELECTRON&year=2014 https://www.webofscience.com/wos/woscc/full-record/WOS:000345393600011
• The trace fossil Zoophycos from the Silurian of EstoniaVinn, Olev; Toom, UrsulaEstonian journal of earth sciences2015 / p. 284-288 : ill https://artiklid.elnet.ee/record=b2750892*est
• Where did the Ordovician Bioerosional Revolution begin?Toom, Ursula; Kröger, Björn; Kuva, Jukka; Laska, W.; Moghalu, Ogechukwu AnnICHNIA 2024 - The 5th International Congress on Ichnology. Celebrating One Ichnology!2024 / p. 279–280 https://kirjandus.geoloogia.info/en/reference/49268
• A Balanoglossites-Trypanites ichnofabric from the Upper Ordovician warm-water carbonates of EstoniaToom, Ursula; Kröger, Björn; Knaust, DirkFollowing in the footsteps of Richard Granville Bromley : abstracts and field guide2023 / p. 38 : ill https://www.researchgate.net/publication/375450713_Following_in_the_footsteps_of_Richard_Granville_Bromley_abstracts_and_field_guide_17th_International_Ichnofabric_Workshop_23-29_October_2023_in_Faxe_Denmark