1. Materials Research Institute
2. Pennsylvania State University
3. University Park 16802
4. USA
5. Electronic Ceramic Department
6. Jozef Stefan Institute
7. Slovenia
8. Department of Physics
9. Technical university of Denmark
10. Lyngby DK-2800 kgs.
11. Denmark
12. Department of Materials Science and Engineering
13. University of Sheffield
14. Sheffield S1 3JD
15. UK
16. Department of Applied Science and Technology
17. Institute of Materials Physics and Engineering
18. 10129 Torino
19. Italy
20. School of Materials Science and Engineering
21. University of New South Wales
22. Sydney
23. Australia