Ralf Tanger Peter Kauff Oliver Schreer Immersive Meeting Point: An Approach Towards Immersive Media Portals. 89-96 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3331&spage=89 2004 conf/pcm/2004-1 PCM (1) db/conf/pcm/pcm2004-1.html#TangerKS04