@conference {1216,
	title = {Implementing an alternative to Sympson-Hetter item-exposure control in constrained adaptive testing},
	booktitle = {Paper presented at the Annual meeting of the National Council on Measurement in Education},
	year = {2003},
	address = {Chicago IL},
	author = {Veldkamp, B. P. and van der Linden, W. J.}
}
