- Geréb, Anna2
- Radev, Valo2
- Bulgarian Unit1
- Dinov, Todor1
- Hristov, Hristo1
- Information Services Department1
- International Helsinki Federation for Human Rights1
- Korabov, Nikolai1
- Open Media Research Institute1
- Ostrovski, Grisha1
- Radio Free Europe/Radio Liberty, Inc - Research Institute1
- Sarchadzhiev, Stefan1
- Sharaliev, Borislav1
- Stoyanov, Todor1