Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Gabriel Samboan, Radu Theodorescu. On the notion of concentration I. Elektronische Informationsverarbeitung und Kybernetik, 4(4):235-255, 1968.
Abstract is missing.