@ARTICLE {
	AUTHOR = "Benjamin Bustos and Gonzalo Navarro",
	TITLE ="Improving the Space Cost of k-NN Search in Metric Spaces by Using Distance Estimators",
	JOURNAL = "Multimedia Tools and Applications (MTAP)",
	VOLUME = "41",
	NUMBER = "2",
	PAGES = "215-233",
	MONTH = "Jan",
	YEAR = "2009",
	PUBLISHER = "Springer",
	ADDRESS = "New York, NY, USA",
	ISSN = "1380-7501"
	}