@article {2117,
	title = {Stratified and maximum information item selection procedures in computer adaptive testing},
	journal = {Journal of Educational Measurement},
	volume = {47},
	year = {2010},
	pages = {202-226},
	author = {Deng, H. and Ansley, T. and Chang, H.-H.}
}
@conference {904,
	title = {To stratify or not: An investigation of CAT item selection procedures under practical constraints},
	booktitle = {Paper presented at the Annual meeting of the National Council on Measurement in Education},
	year = {2003},
	note = {{PDF file, 186 KB}},
	address = {Chicago IL},
	author = {Deng, H. and Ansley, T.}
}
@conference {905,
	title = {a-stratified computerized adaptive testing with unequal item exposure across strata},
	booktitle = {Paper presented at the annual meeting of the American Educational Research Association},
	year = {2001},
	note = {$\#$DE01-01},
	address = {Seattle WA},
	author = {Deng, H. and Chang, Hua-Hua}
}
