Kang Soo Tae Schematic Aspect for Autonomous Agent. 614-623 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2668&spage=614 2003 conf/iccsa/2003-2 ICCSA (2) db/conf/iccsa/iccsa2003-2.html#Tae03