Atzmueller, Martin and Lemmerich, Florian and Krause, Beate and Hotho, Andreas. Towards Understanding Spammers - Discovering Local Patterns for Concept Characterization and Description. Proc. LeGo-09: From Local Patterns to Global Models, Workshop at the 2009 European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases. editor(s) Knobbe, Johannes Fürnkranz Arno. Year 2009.

Atzmueller, Martin and Lemmerich, Florian and Krause, Beate and Hotho, Andreas. Who are the Spammers? Understandable Local Patterns for Concept Description. 7th Conference on Computer Methods and Systems. Krakow, Poland, Year 2009.

Benz, Dominik and Krause, Beate and Kumar, G. Praveen and Hotho, Andreas and Stumme, Gerd. Characterizing Semantic Relatedness of Search Query Terms. Proceedings of the 1st Workshop on Explorative Analytics of Information Networks (EIN2009). Bled, Slovenia, Year 2009.

Benz, Dominik and Eisterlehner, Folke and Hotho, Andreas and Jäschke, Robert and Krause, Beate and Stumme, Gerd. Managing publications and bookmarks with BibSonomy. HT '09: Proceedings of the 20th ACM Conference on Hypertext and Hypermedia. editor(s) Cattuto, Ciro and Ruffo, Giancarlo and Menczer, Filippo. 323--324, ACM, New York, NY, USA, Year 2009.

ECML PKDD Discovery Challenge 2009 (DC09). editor(s) Eisterlehner, Folke and Hotho, Andreas and Jäschke, Robert. CEUR-WS.org, (497) Year 2009.

Hotho, Andreas and Jäschke, Robert and Benz, Dominik and Grahl, Miranda and Krause, Beate and Schmitz, Christoph and Stumme, Gerd. Social Bookmarking am Beispiel BibSonomy. Social Semantic Web. editor(s) Blumauer, Andreas and Pellegrini, Tassilo. X.media.press, 363--391, Springer, Berlin, Heidelberg, Year 2009.

Jäschke, Robert and Eisterlehner, Folke and Hotho, Andreas and Stumme, Gerd. Testing and Evaluating Tag Recommenders in a Live System. Workshop on Knowledge Discovery, Data Mining, and Machine Learning. editor(s) Benz, Dominik and Janssen, Frederik. 44 --51, Year 2009.

Markines, Benjamin and Cattuto, Ciro and Menczer, Filippo and Benz, Dominik and Hotho, Andreas and Stumme, Gerd. Evaluating Similarity Measures for Emergent Semantics of Social Tagging. 18th International World Wide Web Conference. 641--641, Year 2009.

Voss, Jakob and Hotho, Andreas and Jäschke, Robert. Mapping Bibliographic Records with Bibliographic Hash Keys. Information: Droge, Ware oder Commons?. editor(s) Kuhlen, Rainer. Proceedings of the ISI, Verlag Werner Hülsbusch, Year 2009.