@article{journals/jcss/GottlobLS03,
  title = "Robbers, marshals, and guards: game theoretic and logical characterizations of hypertree width",
  author = "Georg Gottlob and Nicola Leone and Francesco Scarcello",
  year = "2003",
  journal = "J. Comput. Syst. Sci.",
  number = "4",
  pages = "775-808",
  volume = "66",
  doi = "10.1016/S0022-0000(03)00030-8",
}