@book {IOPORT.20006527,
    editor       = {Agosti, Maristella and Esposito, Floriana and Meghini, Carlo and Orio, Nicola},
    title        = {Digital libraries and archives - 7th italian research conference, IRCDL 2011, Pisa, Italy, January 20-21, 2011. Revised papers},
    year         = {2011},
    isbn         = {978-3-642-27301-8},
    publisher    = {Springer},
    doi          = {10.1007/978-3-642-27302-5},
    identifier   = {20006527},
}