1. Institute of Theoretical and Applied Informatics, Polish Academy of Sciences, Bałtycka 5, 44-100 Gliwice, Poland
2. Institute of Mathematics, Silesian University of Technology, Kaszubska 23, Gliwice 44-100, Poland
3. Instytut Fizyki im. Smoluchowskiego, Uniwersytet Jagielloński Reymonta 4, 30-059 Kraków, Poland