Akihiro Inokuchi Takashi Washio Hiroshi Motoda A General Framework for Mining Frequent Subgraphs from Labeled Graphs. 53-82 2005 66 Fundam. Inform. 1-2 http://iospress.metapress.com/openurl.asp?genre=article&issn=0169-2968&volume=66&issue=1&spage=53 db/journals/fuin/fuin66.html#InokuchiWM05