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[HNR72] Peter E. Hart, Nils J. Nilsson et Bertram Raphael. Correction to "A Formal Basis for the Heuristic Determination of Minimum Cost Paths". SIGACT News 37:28-29. ACM Press, décembre 1972. 
@article{sigart-news37()-HNR,
  author =              {Hart, Peter E. and Nilsson, Nils J. and Raphael,
                         Bertram},
  title =               {Correction to {"}A~Formal Basis for the Heuristic
                         Determination of Minimum Cost Paths{"}},
  publisher =           {ACM Press},
  journal =             {SIGACT News},
  volume =              {37},
  pages =               {28-29},
  year =                {1972},
  month =               dec,
  doi =                 {10.1145/1056777.1056779},
}
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