Maria Camila Nardini Barioni Humberto Luiz Razente Caetano Traina Jr. Agma J. M. Traina Querying complex objects by similarity in SQL. 130-144 2005 conf/sbbd/2005 SBBD http://www.sbbd-sbes2005.ufu.br/arquivos/artigo-09-BarioniRazente.pdf db/conf/sbbd/sbbd2005.html#BarioniRTT05