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.
E. F. Codd. Missing Information (Applicable and Inapplicable) in Relational Databases. SIGMOD Record, 15(4):53-78, 1986. [doi]
Abstract is missing.