Harris Papageorgiou Prokopis Prokopidis Iason Demiros Nikos Hatzigeorgiou George Carayannis CIMWOS: A Multimedia Retrieval System based on Combined Text, Speech and Image Processing. 38-51 2004 RIAO conf/riao/2004 db/conf/riao/riao2004.html#PapageorgiouPDHC04