Heinz-Gerd Hegering Axel Küpper Claudia Linnhoff-Popien Helmut Reiser Management Challenges of Context-Aware Services in Ubiquitous Environments. 246-259 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2867&spage=246 2003 conf/dsom/2003 DSOM db/conf/dsom/dsom2003.html#HegeringKLR03