@book{124540,
	author = {Duchateau, Luc. and Janssen, Paul. and ebrary, Inc.},
	title = {The frailty model},
	publisher = {Springer Verlag,},
	year = {c2008.},
	series = {Statistics for biology and health},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10210939}
}