| Verfasser | Häufigkeit |
| Artz, Markus 1969- |
3 |
| Aschenbrenner, M. |
3 |
| Hein, Jan von 1967- |
3 |
| Hein, M. |
3 |
| Oetker, Hartmut 1959- |
3 |
| Rixecker, Roland 1951- |
3 |
| Säcker, Franz Jürgen 1941- |
3 |
| Alexander, Mary |
2 |
| Apel, Hein |
2 |
| Apel, Maria |
2 |
| Hein, George E. |
2 |
| Langendörfer, Horst |
2 |
| Aigner, Martin |
1 |
| Altenkirch, Markus |
1 |
| Ammann, Michel 1972- |
1 |
| Beckmann, Matthias W. |
1 |
| Bennett, Beate Hein |
1 |
| Bogdanova, Natalia |
1 |
| Burghaus, Stefanie |
1 |
| Carlson, Marvin A. 1935- |
1 |