DOI10.4064/sm-9-1-133-138zbMath66.0533.01OpenAlexW996908304WikidataQ106713750 ScholiaQ106713750MaRDI QIDQ2587238
D. Milman, M. G. Krejn
Publication date: 1940 Published in: Studia Mathematica (Search for Journal in Brave) Full work available at URL: https://eudml.org/doc/219061