1. Institute of Low Temperature and Structure Research
2. Polish Academy of Sciences
3. 50-950 Wrocław 2
4. Poland
5. Faculdade de Física
6. Universidade Federal do Pará
7. Belém
8. Brazil
9. Department of Experimental Physics
10. Wrocław University of Technology
11. Wrocław
12. Department of Bioorganic Chemistry
13. Faculty of Industry and Economics
14. Wrocław University of Economics
15. 53-345 Wrocław