@inproceedings{DLT-2011-YuG,
	author        = "Sheng Yu and Yuan Gao",
	booktitle     = "{Proceedings of the 15th International Conference on Developments in Language Theory}",
	doi           = "10.1007/978-3-642-22321-1_5",
	isbn          = "978-3-642-22320-4",
	pages         = "46--57",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{State Complexity Research and Approximation}",
	volume        = 6795,
	year          = 2011,
}