| Verfasser | Häufigkeit |
| Dohmen, Christian 1971- |
2 |
| Droit, Emmanuel 1978- |
2 |
| Els, Thomas |
2 |
| Erbguth, Frank 1956- |
2 |
| Hansen, Hans-Christian |
2 |
| Hansen, Jan 1983- |
2 |
| Hansen, Wolf-Rüdiger |
2 |
| Hansen-Oest, Stephan |
2 |
| Haupt, Walter F. |
2 |
| Peschanel, Frank D. |
2 |
| Reichherzer, Frank 1977- |
2 |
| Wertheimer, Daniel |
2 |
| Abel, Ralf B. |
1 |
| Albaladejo, Miguel |
1 |
| Alpar, Gitta 1903-1991 |
1 |
| Arnal, D. |
1 |
| Arning, Marian |
1 |
| Arno, Sig 1895-1975 |
1 |
| Bauer, Silvia C. |
1 |
| Baumgartner, Ulrich |
1 |