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• Some encrusted hardgrounds from the Ordovician of Estonia (Baltica)Vinn, Olev; Toom, UrsulaCarnets de Geologie2015 / p. 63 - 70 https://doi.org/10.4267/2042/56744 https://www.scopus.com/sourceid/7000153259 https://www.scopus.com/record/display.uri?eid=2-s2.0-84934764367&origin=inward&txGid=a55c34788b0c33caee85f66fb773f71e