Maria Barra Tania Cillo Antonio De Santis Umberto Ferraro Petrillo Alberto Negro Vittorio Scarano Multimodal Monitoring of Web Server. 32-41 2002 9 IEEE MultiMedia 3 http://computer.org/multimedia/mu2002/u3032abs.htm db/journals/ieeemm/ieeemm9.html#BarraCSPNS02