| Verfasser | Häufigkeit |
| Ballarini, Klaus |
2 |
| Bamberger, Ingolf 1943- |
2 |
| Behringer, Stefan 1969- |
2 |
| Börner, Christoph J. 1964- |
2 |
| Gleich, Ronald 1962- |
2 |
| Hamer, Eberhard 1932- |
2 |
| Pfohl, Hans-Christian 1942- |
2 |
| Ballarini, Paolo |
1 |
| Castel, Hind |
1 |
| Dimitriou, Ioannis |
1 |
| Iacono, Mauro |
1 |
| Phung-Duc, Tuan |
1 |
| Walraevens, Joris |
1 |