Antonella Santangelo Agnese Augello Salvatore Sorce Giovanni Pilato Antonio Gentile Alessandro Genco Salvatore Gaglio A Virtual Shopper Customer Assistant in Pervasive Environments. 447-456 2007 conf/otm/2007-w1 OTM Workshops (1) http://dx.doi.org/10.1007/978-3-540-76888-3_67 db/conf/otm/otm2007-w1.html#SantangeloASPGGG07