Representing Action and Change by Logic Programs

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\begin{bibtex} @article{DBLP:journals/jlp/GelfondL93,

 author    = {Michael Gelfond and
              Vladimir Lifschitz},
 title     = {Representing Action and Change by Logic Programs},
 journal   = {J. Log. Program.},
 volume    = {17},
 number    = {2/3{\&}4},
 year      = {1993},
 pages     = {301-321},
 bibsource = {DBLP, http://dblp.uni-trier.de}

}

\end{bibtex}