Journal of Intelligent Information Systems · 2007 · 26 citations · 13 references
Natural SciencesMathematicsAlgebraLogicSet TheoryFuzzy LogicFuzzy RelationsFuzzy SetsQuotient Sets
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A relational model of data for large shared data banks
E. F. Codd · Communications of the ACM · 1970 · 5.2K citations · Full text