- Timo Weigand (CERN, Geneva, Switzerland)
- Atish Dabholkar (ICTP, Trieste, Italy)
- Anastasios Petkou (AU, Thessaloniki, Greece)
- Veselin Filev (DIAS, Dublin, Ireland)
- Nikolay Bobev (KU Leuven, Belgium)
- Kiril Hristov (INRNE, BAS, Bulgaria)
- Radoslav Rashkov (Sofia University, Bulgaria)