Published on in Vol 20 , No 1 (2018) :January

1 School of Computer Science and Communication, KTH Royal Institute of Technology, Stockholm, SE
2 Institute of Informatics, Technische Hochschule Köln, University of Applied Sciences, Gummersbach, DE
3 Department of Business Studies, Uppsala University, Uppsala, SE
4 Department of Information Technology, Uppsala University, Uppsala, SE
5 School of Informatics, University of Skövde, Skövde, SE
*all authors contributed equally