Pablo Gamallo Alexandre Agustini José Gabriel Pereira Lopes Acquiring Semantic Classes to Elaborate Attachment Heuristics. 479-487 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2902&spage=479 2003 conf/epia/2003 EPIA db/conf/epia/epia2003.html#GamalloAL03