Aldo Brucale Fabio Cesari Michele d'Amico Massimo Ferri Patrizio Frosini Luciano Gualandri M. Guerra Alberto Lovato I. Pace Image Retrieval through Abstract Shape Indication. 367-370 2000 MVA http://b2.cvl.iis.u-tokyo.ac.jp/mva/proceedings/CommemorativeDVD/2000/papers/2000367.pdf conf/mva/2000 db/conf/mva/mva2000.html#BrucaleCdFFGGLP00