@inbook {1729,
	title = {Termination criteria in computerized adaptive tests: Variable-length CATs are not biased.},
	year = {2009},
	address = { D. J. Weiss (Ed.), Proceedings of the 2009 GMAC Conference on Computerized Adaptive Testing.},
	author = {Babcock, B. and Weiss,  D. J.}
}
