Giuseppe Amato Paolo Bolettieri Franca Debole Fabrizio Falchi Claudio Gennaro Fausto Rabitti Using MPEG-7 for Automatic Annotation of Audiovisual Content in eLearning Digital Libraries. 1-12 2008 IRCDL conf/ircdl/2008 db/conf/ircdl/ircdl2008.html#AmatoBDFGR08