1. TOBB University of Economics and Technology
2. Ankara
3. Turkey
4. Department of Radiation Application
5. Shahid Beheshti University
6. Tehran
7. Iran
8. Department of Physics
9. Department of Mining and Geological Engineering
10. University of Arizona
11. Tucson
12. USA
13. Faculty of Science
14. Benha University
15. 13518 Benha
16. Egypt
17. Institute of Research and Development
18. Duy Tan University
19. Da Nang 550000
20. Vietnam
21. Faculty of Natural Sciences
22. University of Science and Technology Beijing
23. Beijing 100083
24. China
25. Department of Electrical and Computer Engineering
26. Sungkyunkwan University
27. 16419 Suwon
28. Korea
29. Central Laboratory of Solar Energy and New Energy Sources at the Bulg. Acad. Sci.
30. 1784 Sofia
31. Bulgaria