@INPROCEEDINGS{
        ANScpm22.1,
	AUTHOR = "Y. Arakawa and G. Navarro and K. Sadakane",
	TITLE = "Bidirectional r-indexes",
	BOOKTITLE = "Proc. 33rd Annual Symposium on Combinatorial Pattern Matching (CPM)",
	PAGES = "article 11",
        YEAR = 2022
    }