1. Department of Information Technology, University of Debrecen, PO Box 12, H-4010 Debrecen, Hungary
2. Max-Planck-Institut for the Physics of Complex Systems, Noethnitzer Strasse 38, D-01187, Germany
3. Schulich Faculty of Chemistry and Minerva Center of Nonlinear Physics in Complex Systems, Technion—Israel Institute of Technology, Haifa 32000, Israel
4. Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, H-69120, Germany
5. Department of Theoretical Physics, University of Debrecen, PO Box 5, H-4010 Debrecen, Hungary