K
[KMS+04] Daniel Král, Vladan Majerech, Jiří Sgall, Tomáš Tichý, and Gerhard J. Woeginger. It is Tough to be a Plumber. Theoretical Computer Science 313(3):473-484. Elsevier, February 2004. 
@article{tcs313(3)-KMSTW,
  author =              {Kr{\'a}l, Daniel and Majerech, Vladan and Sgall,
                         Ji{\v r}{\'\i} and Tich{\'y}, Tom{\'a}{\v s} and
                         Woeginger, Gerhard J.},
  title =               {It is Tough to be a Plumber},
  publisher =           {Elsevier},
  journal =             {Theoretical Computer Science},
  volume =              {313},
  number =              {3},
  pages =               {473-484},
  year =                {2004},
  month =               feb,
}
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