Luis Quintano Salvador Abreu Irene Pimenta Rodrigues Relational Information Retrieval through Natural Language Analysis. 86-99 2001 conf/inap/2001lncs INAP (LNCS Volume) http://link.springer.de/link/service/series/0558/bibs/2543/25430086.htm db/conf/inap/inap2001lncs.html#QuintanoAR01a