| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1996 | 978-954-427-216-6 | Iordan Andreev | Bulgarskite khanove i tsare: Ot khan Kubrat do tsar Boris III: istoricheski spravochnik (Bulgarian Edition) |
| 2000 | 978-954-427-423-8 | Plamen Pavlov | Buntari i avantiuristi v srednovekovna Bulgariia: [statii] (Bulgarian Edition) |