Krause, B., Jäschke, R., Hotho, A. & Stumme, G. (2008). Logsonomy - Social Information Retrieval with Logdata. HT '08: Proceedings of the Nineteenth ACM Conference on Hypertext and Hypermedia (p./pp. 157--166),Pittsburgh, PA, USA: ACM.ISBN: 978-1-59593-985-2 

Krause, B., Schmitz, C., Hotho, A. & Stumme, G. (2008). The Anti-Social Tagger - Detecting Spam in Social Bookmarking Systems. Proc. of the Fourth International Workshop on  Adversarial Information Retrieval on the Web,.