@inproceedings{DBLP:conf/ipco/GartnerMR05,
  author    = {Bernd G{\"a}rtner and
               Walter D. Morris and
               Leo R{\"u}st},
  title     = {Unique Sink Orientations of Grids},
  booktitle = {IPCO},
  year      = {2005},
  pages     = {210-224},
  ee        = {http://dx.doi.org/10.1007/11496915_16},
  crossref  = {DBLP:conf/ipco/2005},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/ipco/2005,
  editor    = {Michael J{\"u}nger and
               Volker Kaibel},
  title     = {Integer Programming and Combinatorial Optimization, 11th
               International IPCO Conference, Berlin, Germany, June 8-10,
               2005, Proceedings},
  booktitle = {IPCO},
  publisher = {Springer},
  series    = {Lecture Notes in Computer Science},
  volume    = {3509},
  year      = {2005},
  isbn      = {3-540-26199-0},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}