@techreport{tz12:arxiv-lp,
  title = "The power of linear programming for valued {C}{S}{P}s",
  author = "Johan Thapper and Stanislav \v{Z}ivn\'y",
  year = "2012",
  month = "April",
  note = "arXiv:1204.1079v2",
  url = "http://arxiv.org/abs/1204.1079",
}