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- Social Not Working?
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- Proc. of the Fourth International Workshop on Adversarial Information Retrieval on the Web, (2008)
- HMD -- Praxis der Wirtschaftsinformatik (February 2010)
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- Informatik-Spektrum (2010)
- WWW '06: Proceedings of the 15th international conference on World Wide Web, page 585--594. New York, NY, USA, ACM, (2006)
- AI Communications 21(4):231-247 (2008)
- HT '08: Proceedings of the Nineteenth ACM Conference on Hypertext and Hypermedia, page 157--166. New York, NY, USA, ACM, (2008)
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- Intelligent Systems 23(1):76-88 (2008)
- Informatik-Spektrum 29(2):121--124 (April 2006)
- Oldenbourg, (2008)
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- University of Applied Sciences Campus02 Fachhochschule der Wirtschaft Graz Austria, (January 2009)
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