1. 1Brno University of Technology, Faculty of Information Technology, Božetěchova 2, 612 66, Brno, Czech Republic
2. 2Brno University of Technology, Faculty of Information Technology, Božetěchova 2, 612 66, Brno, Czech Republic
3. 3IT4Innovations, VŠB Technical University of Ostrava, 17. listopadu 15/2172, 708 33, Ostrava-Poruba, Czech Republic