C. J. Date, E. F. Codd The Relational and Network Approaches: Comparison of the Application Programming Interfaces. [Citation Graph (17, 0)][DBLP] SIGMOD Workshop, Vol. 2, 1974, pp:83-113 [Conf]
E. F. Codd A Relational Model of Data for Large Shared Data Banks. [Citation Graph (580, 0)][DBLP] Commun. ACM, 1970, v:13, n:6, pp:377-387 [Journal]
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