Luca Tummolini Andrea Lorenzon Giancarlo Bo Roberto Vaccaro iTutor: A Wireless and Multimodal Support to Industrial Maintenance Activities. 302-305 2002 conf/mhci/2002 Mobile HCI http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2411&spage=0302 db/conf/mhci/mhci2002.html#TummoliniLBV02