@conference {1259,
	title = {Optimum number of strata in the a-stratified adaptive testing design},
	booktitle = {Paper presented at the annual meeting of the American Educational Research Association},
	year = {2002},
	note = {{PDF file, 114 KB}},
	address = {New Orleans LA},
	author = {Wen, J.-B. and Chang, Hua-Hua and Hau, K-T.}
}
