@ARTICLE{Derungs2010Jo,
  author = {J{\"o}rg Derungs and Riko Jacob and Peter Widmayer},
  title = {{A}pproximate {S}hortest {P}aths {G}uided by a {S}mall {I}ndex},
  journal = {Algorithmica},
  year = {2010},
  volume = {57},
  pages = {668--688},
  number = {4},
  doi = {http://dx.doi.org/10.1007/s00453-008-9228-5},
  url = {http://www.springerlink.com/content/g406771u5412474p/}
}

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