@article{kz13:jacm,
  title = "The complexity of conservative valued {C}{S}{P}s",
  author = "Vladimir Kolmogorov and Stanislav \v{Z}ivn\'y",
  year = "2013",
  journal = "Journal of the ACM",
  note = "Article No. 10",
  number = "2",
  url = "http://zivny.cz/publications/kz13jacm-preprint.pdf",
  volume = "60",
  doi = "10.1145/2450142.2450146",
}