@book{185854,
	author = {Hallgr�imsson, Benedikt. and ebrary, Inc.},
	title = {Variation},
	publisher = {Elsevier Academic Press,},
	year = {c2005.},
	address = {Amsterdam ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10138166}
}