Latest Sandbian brachiopods and chitinozoan biostratigraphy in North EstoniaHints, Linda; Nõlvak, JaakEstonian journal of earth sciences2023 / p. 42-45 : ill https://doi.org/10.3176/earth.2023.50 Revision of Psammosteus livonicus Obruchev (Agnatha, Heterostraci) from the Devonian Amata regional stage of the NW of the East European platformGlinskiy, Vadim N.; Mark-Kurik, ElgaEstonian journal of earth sciences2016 / p. 1-18 : ill 10.3176/earth.2016.02