Rove Luiza de Oliveira Chishman Renata Vieira Isa Mara da Rosa Alves Sandro Rigo Synonymy for Query Expansion in Information Search. 445-449 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2902&spage=445 2003 conf/epia/2003 EPIA db/conf/epia/epia2003.html#ChishmanVAR03