@book{189596,
	author = {Hull, Kerry M. and ebrary, Inc.},
	title = {Parallel worlds},
	publisher = {University Press of Colorado,},
	year = {c2012.},
	address = {Boulder :},
	edition = {4th ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10576420}
}