Cardoso N.M. J. SilvaB. Martins2010-05-212014-11-142010-05-212014-11-1420062006http://hdl.handle.net/10451/14748http://repositorio.ul.pt/handle/10455/6339engComputer ScienceThe University of Lisbon at CLEF 2006 Ad-Hoc Taskjournal article