Information systems theoretical foundations

A relational model of data for large shared data banks

E. F. Codd · Communications of the ACM · 1970 · 5.2K citations · Full text

Computing, Computer Science, Information Systems +16

On semantic issues connected with incomplete information databases

Witold Lipski · ACM Transactions on Database Systems · 1979 · 513 citations · Full text

Computing, Computer Science, Information Systems +14

The theory of joins in relational databases

A. V. Aho, Catriel Beeri, Jeffrey D. Ullman · ACM Transactions on Database Systems · 1979 · 423 citations · Full text

Computing, Computer Science, Algorithms +14

Information storage and retrieval systems: Mathematical foundations

Wiktor Marek, Zdzisław Pawlak · Theoretical Computer Science · 1976 · 87 citations

Computing, Computer Science, Mathematics +14

Canonical structure in attribute based file organization

Eugene Wong, T.‐C. Chiang · Communications of the ACM · 1971 · 82 citations · Full text

Computing, Computer Science, Information Systems +16