@book{84861,
	author = {Lehmann, Jens,},
	title = {Learning OWL class expressions /},
	publisher = {IOS Press :},
	year = {2010.},
	series = {Studies on the Semantic Web,},
	address = {Heidelberg, Germany :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10827962}
}