@inproceedings{STOC-2005-BojanczykC,
	author        = "Mikolaj Bojanczyk and Thomas Colcombet",
	booktitle     = "{Proceedings of the 37th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/1060590.1060626",
	isbn          = "1-58113-960-8",
	pages         = "234--243",
	publisher     = "{ACM}",
	title         = "{Tree-walking automata do not recognize all regular languages}",
	year          = 2005,
}