Mary Keeler Hegel in a Strange Costume: Reconsidering Normative Science for Conceptual Structures Research. 37-53 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2746&spage=37 2003 conf/iccs/2003 ICCS db/conf/iccs/iccs2003.html#Keeler03