Brakhiopody nadsemejstv Orthacea, Dalmanellacea i Syntrophiacea iz nizhnego ordovika Pribaltiki [Lower Ordovician brachiopods of the superfamilies Orthacea, Dalmanellacea and Syntrophiacea of the Eastern Baltic] - 1961
Distribution of Nautiloids in the Ordovician of Estonia with a Description of some new Genera - 1962