Tiago Sousa Arlindo Silva Ana Neves A Particle Swarm Data Miner. 43-53 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2902&spage=43 2003 conf/epia/2003 EPIA db/conf/epia/epia2003.html#SousaSN03