Evolution of a Katian tropical hardgroundToom, Ursula; Kröger, Björn; Knaust, Dirk; Moghalu, Ogechukwu Ann; Vöröš, Dominik; Vodrážková, StanislavaXI Baltic Stratigraphical Conference : abstracts and field guide2024 / p. 39 https://www.ester.ee/record=b5696260*est https://files.geocollections.info/95c3f9cd-1a5f-428b-a1a6-517682aced9d.pdf Trace fossils from the Ordovician-Silurian boundary beds of Estonia (Baltica)Moghalu, Ogechukwu Ann; Hints, Olle; Toom, UrsulaXI Baltic Stratigraphical Conference : abstracts and field guide2024 / p. 28 https://www.ester.ee/record=b5696260*est https://files.geocollections.info/0c8086e6-7421-467a-b0c2-2f9964fd0bb5.pdf 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