@article {2132,
	title = {Computerized adaptive testing under nonparametric IRT models},
	journal = {Psychometrika},
	volume = {71},
	year = {2006},
	pages = {121-137},
	author = {Xu, X. and Douglas, J.}
}
@conference {1275,
	title = {A simulation study to compare CAT strategies for cognitive diagnosis},
	booktitle = {Paper presented at the annual meeting of the National Council on Measurement in Education},
	year = {2003},
	note = {{PDF file, 250 KB}},
	address = {Chicago IL},
	author = {Xu, X. and Chang, Hua-Hua and Douglas, J.}
}
