Eberhard Becker Dirk Günnewig Getting Insights: DRM Conferences 2000 and 2002. 655-656 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2770&spage=655 2003 conf/drm/2003 Digital Rights Management db/conf/drm/drm2003.html#BeckerG03