Patrik Werle Fredrik Kilander Martin Jonsson Peter Lönnqvist Carl Gustaf Jansson A Ubiquitous Service Environment with Active Documents for Teamwork Support. 139-155 2001 conf/huc/2001 Ubicomp http://link.springer.de/link/service/series/0558/bibs/2201/22010139.htm db/conf/huc/ubicomp2001.html#WerleKJLJ01