@article{DLT-J-2011-GaoY12,
	author        = "Yuan Gao and Sheng Yu",
	doi           = "10.1142/S0129054112400461",
	journal       = "{International Journal of Foundations of Computer Science}",
	number        = 5,
	pages         = "1085--1098",
	publisher     = "{World Scientific}",
	title         = "{State Complexity and Approximation}",
	volume        = 23,
	year          = 2012,
}