Martin Colbert A Diary Study of Rendezvousing: Group Size, Time Pressure and Connectivity. 21-35 2002 conf/mhci/2002 Mobile HCI http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2411&spage=0021 db/conf/mhci/mhci2002.html#Colbert02