1. Department of Applied Cybernetics, Faculty of Science, University of Hradec Králové, 50003 Hradec Kralove, Czech Republic
2. Department of Technics, Faculty of Education, University of Hradec Králové, 50003 Hradec Kralove, Czech Republic
3. Department of Mathematics, Faculty of Science, University of Hradec Králové, 50003 Hradec Kralove, Czech Republic