Conference paper
A data base sublanguage founded on the relational calculus
E.F. Codd
SIGFIDET 1971
No abstract available.
E.F. Codd
SIGFIDET 1971
E.F. Codd
ACM SIGPLAN Notices
E.F. Codd
ACM Transactions on Database Systems (TODS)
E.F. Codd
SIGMOD Record