| Verfasser | Häufigkeit |
|---|---|
| Atanasov, Atanas N. | 2 |
| Georgiev, Georgi N. | 2 |
| Petkov, Boris Iv | 2 |
| Atanasov, Atanas | 1 |
| Boneva, Svetla | 1 |
| Brusarski, Rumen | 1 |
| Christova, Irena Nikolaeva | 1 |
| Oresharski, Plamen | 1 |
| Stoyanov, Velcho | 1 |
| Trifonova, Silvia | 1 |
| Verfasser | Häufigkeit |
|---|---|
| Atanasov, Atanas N. | 2 |
| Georgiev, Georgi N. | 2 |
| Petkov, Boris Iv | 2 |
| Atanasov, Atanas | 1 |
| Boneva, Svetla | 1 |
| Brusarski, Rumen | 1 |
| Christova, Irena Nikolaeva | 1 |
| Oresharski, Plamen | 1 |
| Stoyanov, Velcho | 1 |
| Trifonova, Silvia | 1 |