@Article{DS-labelcover04,
  author =       "Dinur, Irit and Safra, Shmuel",
  title =        "On the hardness of approximating {L}abel-{C}over",
  journal =      "Information Processing Letters",
  volume =       "89",
  number =       "5",
  pages = "247--254",
  year =         "2004",
}