| Mirosław Baran | Pedagogical University of Cracow, Poland |
| Leokadia Białas-Cież | Jagiellonian University, Poland |
| Len Bos | University of Verona, Italy |
| Maciej Klimek | Uppsala University, Sweden |
| Wiesław Pleśniak | Jagiellonian University, Poland |
| Mirosław Baran | Pedagogical University of Cracow, Poland |
| Leokadia Białas-Cież | Jagiellonian University, Poland |
| Len Bos | University of Verona, Italy |
| Maciej Klimek | Uppsala University, Sweden |
| Wiesław Pleśniak | Jagiellonian University, Poland |