- A. Aleman (Lund)
- A. Baranov (St. Petersburg)
- A. Borichev (Marseille)
- S. Richter (University of Tennessee, Knoxwille)
- A. Ulanowski (Stavanger, Norway)
- Y. Tomilov (IMPAN Warsaw)
- P. Wojtaszczyk (University of Warsaw/ IMPAN Warsaw)
- M. Wojciechowski (IMPAN Warsaw)