PaperExtending the database relational model to capture more meaningE.F. CoddACM Transactions on Database Systems (TODS)
Conference paperThe relational and network approaches: Comparison of the application programming interfacesC.J. Date, E.F. CoddSIGFIDET 1974
Conference paperInteractive support for non-programmers: The relational and network approachesE.F. Codd, C.J. DateSIGFIDET 1974
