Ernesto Burattini Massimo De Gregorio Victor M. G. Ferreira Felipe M. G. França NSP: A Neuro-symbolic Processor. 9-16 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2687&spage=9 2003 conf/iwann/2003-2 IWANN (2) db/conf/iwann/iwann2003-2.html#BurattiniGFF03