Gennaro Costagliola Filomena Ferrucci Vittorio Fuccella Luigi Zurolo Logging and Analyzing User's Interactions in Web Portals. 213-229 2007 WEBIST (Selected Papers) http://dx.doi.org/10.1007/978-3-540-68262-2_16 conf/webist/2007sp db/conf/webist/webist2007sp.html#CostagliolaFFZ07