1. Space Research Institute, Austrian Academy of Sciences, 8042 Schmiedlstrasse 6, Graz, Austria
2. Saint Petersburg State University, 198504 Ulyanovskaya 1, Petrodvoretz, Russia
3. Theoretical Physics Division, Petersburg Nuclear Physics Institute, 188300 Gatchina, Russia
4. Institute of Computational Modelling, Russian Academy of Sciences, Siberian Branch, 660036 Krasnoyarsk, Russia
5. Siberian Federal University, 660041 Krasnoyarsk, Russia