Andrzej Ehrenfeucht Ross M. McConnell Sung-Whan Woo Contracted Suffix Trees: A Simple and Dynamic Text Indexing Data Structure. 41-53 2009 CPM http://dx.doi.org/10.1007/978-3-642-02441-2_5 conf/cpm/2009 db/conf/cpm/cpm2009.html#EhrenfeuchtMW09