| Verfasser | Häufigkeit |
| Tzvetkova-Glaser, Anna 1978- |
4 |
| Baleff, Pavel |
2 |
| Bandalovska, Tsvetana |
2 |
| Gyurova, Milena |
2 |
| Hristov, Angel |
2 |
| Iliev, Martin |
2 |
| Petrov, Nikolay |
2 |
| Petrova, Rumyana |
2 |
| Sofijska opera i balet Orkestăr |
2 |
| Tzvetkova, Mariana |
2 |
| Wagner, Richard 1813-1883 |
2 |
| Keupp, Jan 1973- |
1 |
| Platte, Bastian |
1 |
| Schlaaff, Henning Nicolaus Johannes |
1 |
| Tzvetkova-Glaser, Anna |
1 |