Authors
Klaus D. Stiller
Department of Educational Science, Computer Centre, University of Regensburg,, Regensburg, Germany
Regine Bachmaier
Computer Centre, University of Regensburg,, Regensburg, Germany
© 2018 Klaus D. Stiller, Regine Bachmaier, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.