@book{67816,
	author = {Ligozat, G�erard. and ebrary, Inc.},
	title = {Qualitative spatial and temporal reasoning},
	publisher = {ISTE ;},
	year = {2012.},
	address = {London, U.K. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10660573}
}