@book{25288,
	author = {Hasinger, G�unther. and ebrary, Inc.},
	title = {The universe in X-rays},
	publisher = {Springer,},
	year = {c2008.},
	series = {Astronomy and astrophysics library,},
	address = {Berlin ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10223783}
}