@incollection{Meghini09, 
 Author = {Carlo Meghini and Fabrizio Sebastiani and Umberto Straccia}, 
 Booktitle = {Encyclopedia of Database Systems}, 
 Editor = {Ling Liu and M. Tamer Ozsu}, 
 Publisher = {Springer Verlag}, 
 Title = {Multimedia Information Retrieval Model}, 
 Year = {2009}}