@book{229490,
	author = {Laudal, Olav Arnfinn. and ebrary, Inc.},
	title = {Geometry of time-spaces},
	publisher = {World Scientific,},
	year = {c2011.},
	address = {Singapore ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10493528}
}