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E. F. Codd. Missing Information (Applicable and Inapplicable) in Relational Databases. SIGMOD Record, 15(4):53-78, 1986. [doi]
Possibly Related PublicationsThe following publications are possibly variants of this publication: More Commentary on Missing Information in Relational Databases (Applicable and Inapplicable Information)E. F. Codd. SIGMOD, 16(1):42-50, 1987. [doi]
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