Mohamed Y. Eltabakh Wing-Kai Hon Rahul Shah Walid G. Aref Jeffrey Scott Vitter The SBC-tree: an index for run-length compressed sequences. 523-534 2008 EDBT http://doi.acm.org/10.1145/1353343.1353407 conf/edbt/2008 db/conf/edbt/edbt2008.html#EltabakhHSAV08