1. J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic , Praha, Czech Republic
2. Laboratoire d'Aerologie UMR 5560 CNRS/Universite Paul Sabatier , Observatoire de Midi–Pyrenees 14, Toulouse, France
3. Chalmers University , Goteborg, Sweden
4. VŠB - Technical University of Ostrava , Faculty of Safety Engineering, Ostrava, Czech Republic