@book{,
	author          = {Stefano Ceri, Alessandro Bozzon, Marco Brambilla, Emanuele Della Valle, Piero Fraternali},
	title           = {Web Information Retrieval},
	publisher       = {Springer},
	year            = {2013},
	series          = {Data-Centric Systems and Applications},
	isbn            = {978-3-642-39313-6},
	url             = {http://dx.doi.org/10.1007/978-3-642-39314-3},
	group           = {WIS}
}