Torben Weis Martin Saternus Mirko Knoll Alexander Brändle Marco Combetto Towards a general purpose user interface for service-oriented context-aware applications. 53-55 2006 CAI http://doi.acm.org/10.1145/1145706.1145717 conf/avi/2006cai db/conf/avi/cai2006.html#WeisSKBC06