Maxime Crochemore Chiara Epifanio Roberto Grossi Filippo Mignosi A Trie-Based Approach for Compacting Automata. 145-158 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3109&spage=145 2004 conf/cpm/2004 CPM db/conf/cpm/cpm2004.html#CrochemoreEGM04