Luca Passani Building Usable Wireless Applications for Mobile Phones. 9-20 2002 conf/mhci/2002 Mobile HCI http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2411&spage=0009 db/conf/mhci/mhci2002.html#Passani02