1. Department of Chemistry
2. Panjab University
3. Chandigarh-160014
4. India
5. Center for Structural Diffractometry and Department of Chemical and Pharmaceutical Sciences
6. University of Ferrara
7. Ferrara
8. Italy
9. Department of General and Inorganic Chemistry
10. Faculty of Chemistry
11. Aristotle University of Thessaloniki
12. GR-54124 Thessaloniki
13. Greece
14. Wroclaw University
15. Wroclaw 50-283
16. Poland