Colleen Cunningham Rosina Weber Jason M. Proctor Caleb Fowler Michael Murphy Investigating Graphs in Textual Case-Based Reasoning. 573-586 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3155&spage=573 2004 conf/ewcbr/2004 ECCBR db/conf/ewcbr/eccbr2004.html#CunninghamWPFM04