@INPROCEEDINGS{
        CNspire12.1,
        AUTHOR = "F. Claude and G. Navarro",
	TITLE = "Improved Grammar-Based Compressed Indexes",
        BOOKTITLE = {Proc. 19th International Symposium on String Processing and Information Retrieval (SPIRE)},
        YEAR = "2012",
	SERIES = "LNCS 7608",
	PAGES = "180--192"
    }