- A. Cantarero, Spain
- A. Goni, Spain
- A. K. Sood, India
- B. A. Weinstein, USA
- F. Cerdeira, Brazil
- G. H. Li, China
- J. Nakahara, Japan
- K. Syassen, Germany
- K. Takarabe, Japan
- M. Cardona, Germany
- M. Chandrasekhar, USA
- M. I. McMahon, Scotland
- N. E. Christensen, Denmark
- P. Y. Yu, USA
- S. Klotz, France
- S. Ves, Greece
- T. Suski, Poland
- V. Lemos, Brazil
- Z. Arnold, Czech Republic