- Dyulgerov, Georgi5
- Hristov, Hristo3
- Kirkov, Lyudmil3
- Radev, Valo3
- Geréb, Anna2
- Sharaliev, Borislav2
- Zakhariev, Eduard2
- Andonov, Metodi1
- Bulgarian Unit1
- Dinov, Todor1
- Information Services Department1
- International Helsinki Federation for Human Rights1
- Korabov, Nikolai1
- Open Media Research Institute1
- Ostrovski, Grisha1
- Radev, Simeon1
- Radio Free Europe/Radio Liberty, Inc - Research Institute1
- Sarchadzhiev, Stefan1
- Stoyanov, Georgi1
- Stoyanov, Todor1