@ARTICLE {
        HNkais13,
	AUTHOR = "C. Hern{\'a}ndez and G. Navarro",
	TITLE = "Compressed Representations for Web and Social Graphs",
        JOURNAL = "Knowledge and Information Systems",
        PUBLISHER = "Springer",
	YEAR = 2014,
	VOLUME = 40,
	NUMBER = 2,
	PAGES = "279--313"
        }