1. Department of Physical and Theoretical Chemistry; Faculty of Natural Sciences; Comenius University, Mlynska dolina; Ilkovicova 6 842 15 Bratislava Slovakia
2. Institute of Nuclear and Physical Engineering; Faculty of Electrical Engineering and Information Technology; Slovak University of Technology; Ilkovicova 3 812 19 Bratislava Slovakia
3. International Laser Centre; Ilkovicova 3 812 19 Bratislava Slovakia
4. Ruprecht A. Institute of Technology; Grosslingova 45 811 09 Bratislava Slovakia