Clean the graph before you draw it!. Gaspers, S., Messinger, M., Nowakowski, R. J., & Pralat, P. Inf. Process. Lett., 109(10):463--467, 2009.
Clean the graph before you draw it! [link]Paper  doi  bibtex   
@article{DBLP:journals/ipl/GaspersMNP09,
  author    = {Serge Gaspers and
               Margaret{-}Ellen Messinger and
               Richard J. Nowakowski and
               Pawel Pralat},
  title     = {Clean the graph before you draw it!},
  journal   = {Inf. Process. Lett.},
  volume    = {109},
  number    = {10},
  pages     = {463--467},
  year      = {2009},
  url       = {http://dx.doi.org/10.1016/j.ipl.2009.01.003},
  doi       = {10.1016/j.ipl.2009.01.003},
  timestamp = {Thu, 03 Sep 2009 01:00:00 +0200},
  biburl    = {http://dblp.dagstuhl.de/rec/bib/journals/ipl/GaspersMNP09},
  bibsource = {dblp computer science bibliography, http://dblp.org}
}

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