Incomplete Information in Relational Databases
Journal of the ACM (JACM)
On the representation and querying of sets of possible worlds
SIGMOD '87 Proceedings of the 1987 ACM SIGMOD international conference on Management of data
A foundation of CODD's relational maybe-operations
ACM Transactions on Database Systems (TODS)
On semantic issues connected with incomplete information databases
ACM Transactions on Database Systems (TODS)
Extending the database relational model to capture more meaning
ACM Transactions on Database Systems (TODS)
Null values in data base management a denotational semantics approach
SIGMOD '79 Proceedings of the 1979 ACM SIGMOD international conference on Management of data
Theory of Relational Databases
Theory of Relational Databases
Incomplete Relational Database Models Based on Intervals
IEEE Transactions on Knowledge and Data Engineering
Database systems for programmable logic controllers
SSDBM'1990 Proceedings of the 5th international conference on Statistical and Scientific Database Management
IJCAI'91 Proceedings of the 12th international joint conference on Artificial intelligence - Volume 2
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