New biostratigraphically important chitinozoans from the Kukruse Regional Stage, Upper Ordovician of BaltoscandiaNõlvak, Jaak; Bauert, GarmenEstonian journal of earth sciences2015 / p. 218-224 : ill https://artiklid.elnet.ee/record=b2739527*est https://doi.org/10.3176/earth.2015.28 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS