@inbook {1924,
	title = {The shadow-test approach: A universal framework for implementing adaptive testing},
	year = {2007},
	note = {{PDF file, 461 KB}},
	address = {D. J. Weiss (Ed.), Proceedings of the 2007 GMAC Conference on Computerized Adaptive Testing.},
	author = {van der Linden, W. J.}
}
