• The lower boundary of the Haljala Regional Stage (Sandbian, Upper Ordovician) in EstoniaPaiste, Tõnn; Männik, Peep; Nõlvak, Jaak; Meidla, TõnuEstonian journal of earth sciences2020 / p. 76–90 : ill https://doi.org/10.3176/earth.2020.05 https://www.scopus.com/sourceid/6000195392 https://www.scopus.com/record/display.uri?eid=2-s2.0-85085035292&origin=inward&txGid=6fb77f736e16c8d0b175b38cb42b58bc https://jcr.clarivate.com/jcr-jp/journal-profile?journal=EST%20J%20EARTH%20SCI&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000540165800002