@article{VLDB-2011-CapanniniNPS,
	author        = "Gabriele Capannini and Franco Maria Nardini and Raffaele Perego and Fabrizio Silvestri",
	ee            = "http://www.vldb.org/pvldb/vol4/p451-capannini.pdf",
	journal       = "{Proceedings of the VLDB Endowment}",
	number        = 7,
	pages         = "451--459",
	title         = "{Efficient Diversification of Web Search Results}",
	volume        = 4,
	year          = 2011,
}