Giovanni Casella Vincenzo Deufemia Viviana Mascardi Maurizio Martelli Genoveffa Tortora Reasoning about Hand-Drawn Sketches: An Approach Based on Intelligent Software Agents. 302-314 2008 VISUAL http://dx.doi.org/10.1007/978-3-540-85891-1_33 conf/visual/2008 db/conf/visual/visual2008.html#CasellaDMMT08