1. Department of Physics
2. University of North Bengal
3. Siliguri-734 013
4. India
5. Institute of Physics
6. The Czech Academy of Sciences
7. 182 21 Prague
8. Czech Republic
9. Martin-Luther-Universität Halle-Wittenberg
10. Institut für Chemie
11. Physikalische Chemie
12. Halle
13. Germany
14. Institute of Chemistry
15. Military University of Technology
16. Warsaw
17. Poland