Paolo Bottoni Alessandro Cinnirella Stefano Faralli Patrick Maurelli Emanuele Panizzi Rosa Trinchese Multimedia Annotation of Geo-Referenced Information Sources. 675-682 2006 conf/mrcs/2006 MRCS http://dx.doi.org/10.1007/11848035_89 db/conf/mrcs/mrcs2006.html#BottoniCFMPT06