Christian Kray Antonio Krüger Christoph Endres Some Issues on Presentations in Intelligent Environments. 15-26 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2875&spage=15 2003 conf/eusai/2003 EUSAI db/conf/eusai/eusai2003.html#KrayKE03