@article{GHT11,
  title = "{LIFO-search: A min-max theorem and a searching game for cycle-rank and tree-depth.}",
  author = "Archontia Giannopoulou and Paul Hunter and Dimitrios Thilikos",
  year = "2011",
  journal = "Discrete Mathematics",
  note = "Submitted",
  url = "http://www.comlab.ox.ac.uk/people/Paul.Hunter/papers/lifo-journal.pdf",
}