Backtracking: and the winner is...

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\begin{bibtex} @article{DBLP:journals/sigart/Welty00a,

 author    = {Christopher A. Welty},
 title     = {Backtracking: and the winner is...},
 journal   = {Intelligence},
 volume    = {11},
 number    = {4},
 year      = {2000},
 pages     = {57},
 ee        = {http://doi.acm.org/10.1145/355137.355145},
 bibsource = {DBLP, http://dblp.uni-trier.de}

}

\end{bibtex}