1. Jožef Stefan International Postgraduate School, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia
2. Institute of Computational Physics, Zurich University of Applied Sciences (ZHAW), Technikumstrasse 71, 8400 Winterthur, Switzerland
3. Jozef Stefan Institute, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia
4. Faculty of Natural Sciences and Mathematics, University of Maribor, Koroška Cesta 160, SI-2000 Maribor, Slovenia