On the integrated regional Ordovician correlation charts of Estonia, Latvia and LithuaniaMeidla, Tõnu; Ainsaar, Leho; Hints, Olle; Radzevičius, SigitasXI Baltic Stratigraphical Conference : abstracts and field guide2024 / p. 27 https://www.ester.ee/record=b5696260*est https://files.geocollections.info/e43a1c1e-5343-4356-afea-b40a758e7009.pdf

Silurian stratigraphy in Estonia : Recent developments and challengesMännik, Peep; Meidla, Tõnu; Hints, OlleXI Baltic Stratigraphical Conference : abstracts and field guide2024 / p. 25 https://www.ester.ee/record=b5696260*est https://files.geocollections.info/5ed8b9aa-c29c-43b4-8f3a-3e5495c9d277.pdf