Darko Obradovic, Stephan Baumann, A Journey to the Core of the Blogosphere, Proceedings of the International Conference on Advances in Social Network Analysis and Mining (ASONAM 2009), Athens, Greece, pp.1-6, IEEE, 2009 (Best Paper Award)

Martin Memmel, Michael Kockler and Rafael Schirru, Providing Multi Source Tag Recommendations in a Social Resource Sharing Platform. In Journal of Universal Computer Science, vol. 15, no. 3, pages 678-691. Graz, Austria 2009.

Martin Wolpers, Martin Memmel, Hans-Christian Schmitz, Martin Friedrich, Marco Jahn, Rafael Schirru, Usage metadata based support for learning activity reflection. In Proceedings of I-KNOW ’09, Graz, Austria (to be published)