Simon Holland Robert Day Grégory Leplâtre Alistair D. N. Edwards Mobile HCI and Sound. 527-528 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3160&spage=527 2004 conf/mhci/2004 Mobile HCI db/conf/mhci/mhci2004.html#HollandDLE04