1. Wigner Research Centre for Physics, H-1121 Budapest, Hungary
2. Electrophysics Institute, Óbuda University, H-1034 Budapest, Hungary
3. Department of Computer Science and Information Theory, Faculty of Electrical Engineering and Informatics, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
4. Ericsson Hungary, H-1117 Budapest, Hungary
5. Axoncord Ltd., H-1048 Budapest, Hungary
6. Department of Quantitative Methods, Faculty of Business and Economics, University of Pannonia, H-8200 Veszprém, Hungary