Korinna Bade Andreas Nürnberger Supporting Web Search by User Specific Document Categorization: Intelligent Bookmarks. 115-123 2005 conf/lit/2005 Leipziger Informatik-Tage db/conf/lit/lit2005.html#BadeN05 https://dl.gi.de/handle/20.500.12116/24917 http://subs.emis.de/LNI/Proceedings/Proceedings72/article3741.html