- Proceedings of the 20th ACM conference on Hypertext and hypermedia, page 323–324. New York, NY, USA, ACM, (2009)ACM ID: 1557969 .
- HT '09: Proceedings of the 20th ACM Conference on Hypertext and Hypermedia, page 323--324. New York, NY, USA, ACM, (June 2009)
- HT '09: Proceedings of the 20th ACM Conference on Hypertext and Hypermedia, page 323--324. New York, NY, USA, ACM, (June 2009)
- RecSys '09: Proceedings of the third ACM Conference on Recommender Systems, page 369--372. New York, NY, USA, ACM, (2009)
- HMD -- Praxis der Wirtschaftsinformatik (February 2010)
- HMD -- Praxis der Wirtschaftsinformatik (February 2010)
- HMD -- Praxis der Wirtschaftsinformatik (February 2010)
- HT '09: Proceedings of the 20th ACM Conference on Hypertext and Hypermedia, page 323--324. New York, NY, USA, ACM, (June 2009)
- HMD -- Praxis der Wirtschaftsinformatik (February 2010)
- Workshop on Knowledge Discovery, Data Mining, and Machine Learning, page 44--51. (September 2009)
- HMD -- Praxis der Wirtschaftsinformatik (February 2010)
- Workshop on Knowledge Discovery, Data Mining, and Machine Learning, page 44 --51. (September 2009)
- Workshop on Knowledge Discovery, Data Mining, and Machine Learning, page 44 --51. (September 2009)
- ACM, New York, NY, USA, (June 2009)
- HT '09: Proceedings of the 20th ACM Conference on Hypertext and Hypermedia, page 323--324. New York, NY, USA, ACM, (June 2009)
- Workshop on Knowledge Discovery, Data Mining, and Machine Learning, page 44 --51. (September 2009)
- HT '09: Proceedings of the 20th ACM Conference on Hypertext and Hypermedia, page 323--324. New York, NY, USA, ACM, (June 2009)
- HT '09: Proceedings of the 20th ACM Conference on Hypertext and Hypermedia, page 323--324. New York, NY, USA, ACM, (June 2009)
- Workshop on Knowledge Discovery, Data Mining, and Machine Learning, page 44--51. (September 2009)
- HT '09: Proceedings of the 20th ACM Conference on Hypertext and Hypermedia, page 323--324. New York, NY, USA, ACM, (June 2009)


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