@book{Rijsbergen:1979,
	title = {Information Retrieval},
	address = {London},
	author = {C.J. van Rijsbergen},
	edition = {2},
	publisher = {Butterworths},
	url = {http://www.dcs.gla.ac.uk/Keith/Preface.html},
	year = {1979},
	biburl = {http://www.bibsonomy.org/bibtex/2f1e859ee66e836963b27909523b38f01/diego_ma},
	keywords = {inf_retrieval }
}