Margit Kastner, Gerhard Furtmüller. Operationalization of the Metadata Element Difficulty . In J. Michael Spector, Demetrios G. Sampson, Toshio Okamoto, Kinshuk, Stefano A. Cerri, Maomi Ueno, Akihiro Kashihara, editors, Proceedings of the 7th IEEE International Conference on Advanced Learning Technologies, ICALT 2007, July 18-20 2007, Niigata, Japan. pages 608-612, IEEE Computer Society, 2007. [doi]
Abstract is missing.