Hotho, Andreas, Jäschke, Robert, Schmitz, Christoph and Stumme, Gerd. "BibSonomy: A Social Bookmark and Publication Sharing System." Paper presented at the meeting of the Proceedings of the First Conceptual Structures Tool Interoperability Workshop at the 14th International Conference on Conceptual Structures, Aalborg, 2006.

Schmitz, Christoph, Hotho, Andreas, Jäschke, Robert and Stumme, Gerd. "Mining Association Rules in Folksonomies." Paper presented at the meeting of the Data Science and Classification. Proceedings of the 10th IFCS Conf., Heidelberg, 2006.