Komon Ibe Shinobu Saito Shuichiro Yamamoto ARM: Actor Relationship Matrix. 423-426 2008 JCKBSE http://dx.doi.org/10.3233/978-1-58603-900-4-423 conf/jckbse/2008 db/conf/jckbse/jckbse2008.html#IbeSY08