@conference {999,
	title = {Solving complex constraints in a-stratified computerized adaptive testing designs},
	booktitle = {Paper presented at the annual meeting of the National Council on Measurement in Education},
	year = {2000},
	note = {PDF file, 384 K},
	address = {New Orleans, USA},
	author = {Leung, C-K.. and Chang, Hua-Hua and Hau, K-T.}
}
