Matthias Deller Stefan Agne Achim Ebert Andreas Dengel Hans Hagen Bertin Klein Michael Bender Tony Bernardin Bernd Hamann Managing a document-based information space. 119-128 2008 IUI http://doi.acm.org/10.1145/1378773.1378789 conf/iui/2008 db/conf/iui/iui2008.html#DellerAEDHKBBH08