Lucia Terrenghi Carla Valle Giorgio De Michelis Interaction Design for CSCL in Ubiquitous Computing. 523-524 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3160&spage=523 2004 conf/mhci/2004 Mobile HCI db/conf/mhci/mhci2004.html#TerrenghiVM04