Thimoty Barbieri Antonio Bianchi Licia Sbattella Minus-Two: Multimedia, Sound Spatialization and 3D Representation for Cognitively Impaired Children. 1054-1061 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3118&spage=1054 2004 conf/icchp/2004 ICCHP db/conf/icchp/icchp2004.html#BarbieriBS04