user- Bulletin of the American Society for Information Science and Technology (2007)
- Journal of Theoretical and Applied Electronic Commerce Research 3(2):30-43 (August 2008)
- Erfolgreiches Management von Bibliotheken und Informationseinrichtungen. Fachratgeber für Bibliotheksleiter und Bibliothekare, 9/3.7 . (2008)
- Shaker Verlag, (2008)isbn=978-3-8322-7447-4, issn=1438-8081 .
- Eichborn, 1 edition, (2008)
- Inetbib 2008 - 10. InetBib-Tagung vom 09. bis 11. April 2008 in Würzburg (2008)
- 6th International Fujaba Days, page 10-14. Dresden, Germany, (2008)
- (2008)
- SAC '07: Proceedings of the 2007 ACM symposium on Applied computing, page 1667--1672. New York, NY, ACM, (2007)
- First Monday (June 2008)
- Wired Magazine (June 2006)
- (2008)
- (2005)
- (2005)
- (2006)
- Information, Wissenschaft und Praxis (2008)
- 2007-01. Universitaet der Bundeswehr Muenchen, Fakultaet fuer Informatik, (February 2007)
- HYPERTEXT '06: Proceedings of the seventeenth conference on Hypertext and hypermedia, page 31--40. New York, NY, USA, ACM, (2006)
- New York, Random House Inc., (2004)
- CHI '08: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, page 1545--1554. New York, NY, ACM, (2008)
