@inproceedings{Hunter11,
  title = "LIFO-Search on Digraphs: A Searching Game for Cycle-Rank",
  author = "Paul Hunter",
  year = "2011",
  booktitle = "18th International Symposium on Fundamentals of Computation Theory (FCT)",
  pages = "217-228",
  url = "http://www.comlab.ox.ac.uk/people/Paul.Hunter/papers/lifo-digraph.pdf",
}