Principles of database and knowledge-base systems, Vol. I
Principles of database and knowledge-base systems, Vol. I
A relational model of data for large shared data banks
Communications of the ACM
Rough Sets: Theoretical Aspects of Reasoning about Data
Rough Sets: Theoretical Aspects of Reasoning about Data
Including Group-By in Query Optimization
VLDB '94 Proceedings of the 20th International Conference on Very Large Data Bases
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