M. Schrapel, A. Finger, J. Meyer, M. Rohs, J. Schöning, und A. Voit. Proceedings of the 2018 ACM International Joint Conference and 2018 International Symposium on Pervasive and Ubiquitous Computing and Wearable Computers, Seite 660--661. New York, NY, USA, ACM, (2018)