@book{irEng,
	title = {Information Retrieval},
	address = {London},
	author = {C.J. {van Rijsbergen}},
	publisher = {Butterworths},
	year = {1979},
	biburl = {http://www.bibsonomy.org/bibtex/2f1e859ee66e836963b27909523b38f01/jil},
	description = {a big one},
	keywords = {buch englisch information ir precision projekt recall retrieval semantic web }
}