Making Object-Oriented Schemas More Expressive
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\begin{bibtex} @inproceedings{DBLP:conf/pods/CalvaneseL94,
author = {Diego Calvanese and
Maurizio Lenzerini},
title = {Making Object-Oriented Schemas More Expressive},
booktitle = {PODS},
year = {1994},
pages = {243-254},
ee = {http://doi.acm.org/10.1145/182591.182620, db/conf/pods/pods94-243.html},
crossref = {DBLP:conf/pods/94},
bibsource = {DBLP, http://dblp.uni-trier.de}
}
\end{bibtex}
