| 1 (1971) | Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences | BGR |  | |
| 2 (2314) | Bulgarian Academy of Sciences * | BGR | | |
| 3 (2378) | University of Chemical Technology and Metallurgy | BGR |  | |
| 4 (2581) | Medical University of Varna Prof Dr Paraskev Stoyano | BGR | | |
| 5 (2879) | Institute of Organic Chemistry with Centre of Phytochemistry Bulgarian Academy of Sciences | BGR | | |
| 6 (3522) | Sofia University | BGR | | |
| 7 (3723) | Medical University of Sofia * | BGR | | |
| 8 (3819) | Medical University - Plovdiv | BGR | | |
| 9 (4130) | Trakia University | BGR | |
