Isabelle Moulinier Hugo Molina-Salgado Thomson Legal and Regulatory Experiments for CLEF 2002. 155-163 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2785&spage=155 2002 conf/clef/2002 CLEF db/conf/clef/clef2002.html#MoulinierM02