@article {194,
	title = {Theoretical results and item selection from multidimensional item bank in the Mokken IRT model for polytomous items},
	journal = {Applied Psychological Measurement},
	volume = {19},
	number = {4},
	year = {1995},
	pages = {337{\textendash}352},
	author = {Hemker, B. T. and Sijtsma, K. and Molenaar, I. W.}
}
