@INPROCEEDINGS {
	AUTHOR = "Nieves Brisaboa and Susana Ladra and Gonzalo Navarro",
	TITLE = "K2-trees for Compact Web Graph Representation",
	EDITOR = "Jussi Kalgren and Jorma Tarhio and Heikki Hyyr{\"o}",
	BOOKTITLE = "16th International Symposium on String Processing and Information Retrieval (SPIRE)",
	PAGES = "18-30",
	MONTH = "Aug",
	YEAR = "2009",
	ADDRESS = "Saariselk{\"a}, Finland",
	PUBLISHER = "Springer-Verlag",
	SERIES ="Lecture Notes in Computer Science",
	NUMBER = "5721",
	ISBN = "978-3-642-03783-2",
	}