M. Zimmermann, E. Ntoutsi, and M. Spiliopoulou. Proceedings of the 2014 IEEE 14th International Conference on Data Mining Workshops, Washington, DC, USA, IEEE Computer Society, (2014)accepted, to appear December 2014.
G. Krempl, and V. Hofer. Proceedings of the Symposium Learning, Knowledge, Adaptation (LWA 2011) of the GI Special Interest Groups KDML, IR and WM., page 65--72. (September 2011)