About this article
Published Online: Jul 09, 2019
Page range: 256 - 260
DOI: https://doi.org/10.2478/stap-2018-0011
© 2018 George Walkden et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
George Walkden
University of Konstanz,
Michaela Hejná
Aarhus University,