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SergeiNatanovichBernstein.tex. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=SergeiNatanovichBernstein.tex&oldid=38424
SergeiNatanovichBernstein.tex. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=SergeiNatanovichBernstein.tex&oldid=38424