Optimizing Queries with Universal Quantification in Object-Oriented and Object-Relational Databases
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\begin{bibtex} @inproceedings{DBLP:conf/vldb/ClaussenKMP97, crossref={DBLP:conf/vldb/97}, title={Optimizing Queries with Universal Quantification in Object-Oriented and Object-Relational Databases}, pages={286-295}, year={1997}, booktitle={VLDB}, url={http://www.informatik.uni-trier.de/~ley/db/conf/vldb/vldb97.html#ClaussenKMP97}, ee={db/conf/vldb/ClaussenKMP97.html}, cdrom={VLDB97/P286.PDF}, author={Jens Claußen and Alfons Kemper and Guido Moerkotte and Klaus Peithner} }\end{bibtex}
