Conodont biostratigraphy of the Oandu Stage (Katian, Upper Ordovician) in NE EstoniaMännik, PeepEstonian journal of earth sciences2017 / p. 1-12 : ill https://doi.org/10.3176/earth.2017.02

The early Katian (Late Ordovician) reefs near Saku, northern Estonia and the age of the Saku Member, Vasalemma FormationKröger, Björn; Hints, Linda; Lehnert, Oliver; Männik, Peep; Joachimski, Michael M.Estonian journal of earth sciences2014 / p. 271-276 : ill https://doi.org/10.3176/earth.2014.30 https://artiklid.elnet.ee/record=b2705917*est