Description Logics with Concrete Domains and Aggregation

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\begin{bibtex} @inproceedings{DBLP:conf/ecai/BaaderS98,

 author    = {Franz Baader and
              Ulrike Sattler},
 title     = {Description Logics with Concrete Domains and Aggregation},
 booktitle = {ECAI},
 year      = {1998},
 pages     = {336-340},
 bibsource = {DBLP, http://dblp.uni-trier.de}

}

\end{bibtex}