Paola Velardi Roberto Navigli Alessandro Cucchiarelli Fulvio D'Antonio A New Content-Based Model for Social Network Analysis. 18-25 2008 ICSC http://doi.ieeecomputersociety.org/10.1109/ICSC.2008.30 conf/semco/2008 db/conf/semco/icsc2008.html#VelardiNCD08