Marcos André Gonçalves Edward A. Fox Aaron Krowne Pável Calado Alberto H. F. Laender Altigran Soares da Silva Berthier A. Ribeiro-Neto The effectiveness of automatically structured queries in digital libraries. 98-107 2004 conf/jcdl/2004 JCDL http://doi.acm.org/10.1145/996350.996377 db/conf/jcdl/jcdl2004.html#GoncalvesFKCLSR04