Chiara Epifanio Alessandra Gabriele Filippo Mignosi Languages with Mismatches and an Application to Approximate Indexing. 224-235 2005 conf/dlt/2005 Developments in Language Theory http://dx.doi.org/10.1007/11505877_20 db/conf/dlt/dlt2005.html#EpifanioGM05