Eneko Agirre Giorgio Maria Di Nunzio Nicola Ferro Thomas Mandl Carol Peters CLEF 2008: Ad Hoc Track Overview. 15-37 2008 CLEF http://dx.doi.org/10.1007/978-3-642-04447-2_2 conf/clef/2008 db/conf/clef/clef2008.html#AgirreNFMP08