@ARTICLE {
        BdBKNSis16,
	AUTHOR = "N. Brisaboa and G. de Bernardo and R. Konow and G. Navarro
		  and D. Seco",
	TITLE = "Aggregated 2D Range Queries on Clustered Points",
	JOURNAL = "Information Systems",
        YEAR = 2016,
	VOLUME = 60,
	PAGES = "34--49"
        }