@book{206404,
	author = {Christensen, Karl Bang,},
	title = {Rasch models in health /},
	publisher = {ISTE Ltd. ;},
	year = {2013.},
	series = {Applied mathematics series},
	address = {London :},
	url = {http://onlinelibrary.wiley.com/book/10.1002/9781118574454}
}