Costa, Luís FernandoSantos, Diana2009-11-032009-11-032007-01-122007Luís Fernando Costa; Diana Santos. "Question answering systems: a partial answer". (SINTEF, Oslo, 22 de Janeiro de 2007)http://hdl.handle.net/10400.26/159http://www.linguateca.pt/superb/busca_publ.pl?idi=1168638214application/pdfenglecture