Procedural languages for database queries and updates
Journal of Computer and System Sciences
Towards a theory of spatial database queries (extended abstract)
PODS '94 Proceedings of the thirteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Selected papers of the 9th annual ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Topological queries in spatial databases
PODS '96 Proceedings of the fifteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
A general strategy for decomposing topological invariants of spatial databases and an application
Data & Knowledge Engineering
Query Languages for Real Number Databases Based on Descriptive Complexity over R
MFCS '99 Proceedings of the 24th International Symposium on Mathematical Foundations of Computer Science
Safe Datalog Queries with Linear Constraints
CP '98 Proceedings of the 4th International Conference on Principles and Practice of Constraint Programming
Expressing Topological Connectivity of Spatial Databases
DBPL '99 Revised Papers from the 7th International Workshop on Database Programming Languages: Research Issues in Structured and Semistructured Database Programming
On First-Order Topological Queries
LICS '00 Proceedings of the 15th Annual IEEE Symposium on Logic in Computer Science
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