Wei Li Martin Jonsson Fredrik Kilander Carl Gustaf Jansson Building Infrastructure Support for Ubiquitous Context-Aware Systems. 509-518 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3358&spage=509 2004 conf/ispa/2004 ISPA db/conf/ispa/ispa2004.html#LiJKJ04