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    References

    References

    Codd, E.F. (1970) A Relational Model for Large Shared Data Banks. Communications of the ACM, 13(6):377–387.

    Codd, E.F. (1972) Relational Completeness of Data Base Sublanguages. In R. Rustin (ed.), Database Systems, 65–98. Prentice-Hall.


      

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