Multilanguage hierarchical logics (or: how we can do without modal logics)

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\begin{bibtex} @inproceedings{DBLP:conf/cnkbs/GiunchigliaS92,

 author    = {Fausto Giunchiglia and
              Luciano Serafini},
 title     = {Multilanguage hierarchical logics (or: how we can do without
              modal logics)},
 booktitle = {CNKBS},
 year      = {1992},
 pages     = {44-45},
 crossref  = {DBLP:conf/cnkbs/1992},
 bibsource = {DBLP, http://dblp.uni-trier.de}

}

\end{bibtex}