| Autor | Częstotliwość |
| Tewes, Annette |
3 |
| Neitzel, Sönke |
2 |
| Berkel, Alexander |
1 |
| Corni, Gustavo |
1 |
| Dogliani, Patrizia |
1 |
| Gentile, Carlo |
1 |
| Gigli, Marzia |
1 |
| Greulich, Anja |
1 |
| Heidenreich, Bernd |
1 |
| Hessische Landeszentrale für politische Bildung (HLZ) |
1 |
| Klinkhammer, Lutz |
1 |
| Knopp, Guido |
1 |
| Monicelli,Elena |
1 |
| Osti Guerrazzi, Amadeo |
1 |
| Schlemmer, Thomas |
1 |
| Scholtyseck, Joachim |
1 |
| Sorlin, Pierre |
1 |
| Steger, Lea |
1 |
| Turi, Nicola |
1 |
