@inproceedings{CIAA-2014-Pighizzini,
	author        = "Giovanni Pighizzini",
	booktitle     = "{Proceedings of the 19th International Conference on Implementation and Application of Automata}",
	doi           = "10.1007/978-3-319-08846-4_3",
	isbn          = "978-3-319-08845-7",
	pages         = "42--57",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Investigations on Automata and Languages over a Unary Alphabet}",
	volume        = 8587,
	year          = 2014,
}