@booklet {1509,
	title = {A selection procedure for polytomous items in computerized adaptive testing (Measurement and Research Department Reports 2000-5)},
	year = {2000},
	address = {Arnhem, The Netherlands: Cito},
	author = {Rijn, P. W. van, and Theo Eggen and Hemker, B. T. and Sanders, P. F.}
}
