@inproceedings{KreutzerTaz10,
  author = "Stephan Kreutzer and Siamak Tazari",
  booktitle = "Symposium on Discrete Algorithms (SODA)",
  title = "On Brambles, Grid-Like Minors, and Parameterized Intractability of Monadic Second-Order Logic",
  url = "http://web.comlab.ox.ac.uk/people/Stephan.Kreutzer/Publications/10-soda.pdf",
  year = "2010",
}