Raphaël Clifford Klim Efremenko Benny Porat Ely Porat A Black Box for Online Approximate Pattern Matching. 143-151 2008 CPM http://dx.doi.org/10.1007/978-3-540-69068-9_15 conf/cpm/2008 db/conf/cpm/cpm2008.html#CliffordEPP08