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"The Theory of Joins in Relational Databases."
Alfred V. Aho, Catriel Beeri, Jeffrey D. Ullman (1979)
- Alfred V. Aho, Catriel Beeri, Jeffrey D. Ullman:
The Theory of Joins in Relational Databases. ACM Trans. Database Syst. 4(3): 297-314 (1979)
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