@inproceedings{DLT-2011-KuncO,
	author        = "Michal Kunc and Alexander Okhotin",
	booktitle     = "{Proceedings of the 15th International Conference on Developments in Language Theory}",
	doi           = "10.1007/978-3-642-22321-1_28",
	isbn          = "978-3-642-22320-4",
	pages         = "324--336",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Describing Periodicity in Two-Way Deterministic Finite Automata Using Transformation Semigroups}",
	volume        = 6795,
	year          = 2011,
}