Pierpaolo Basile Annalina Caputo Anna Lisa Gentile Marco Degemmis Pasquale Lops Giovanni Semeraro Improving Retrieval Experience Exploiting Semantic Representation of Documents. 2008 SWAP http://ceur-ws.org/Vol-426/swap2008_submission_55.pdf conf/swap/2008 db/conf/swap/swap2008.html#BasileCGDLS08