| 1 (1571) | Bulgarian Academy of Sciences * | BGR |  |
| 2 (2349) | Institute of Mathematics and Informatics Bulgarian Academy of Sciences | BGR | |
| 3 (2518) | University of Plovdiv Paisii Hilendarski | BGR |  |
| 4 (2711) | Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences | BGR | |
| 5 (2953) | Sofia University | BGR | |
| 6 (3121) | Technical University of Sofia | BGR | |
| 7 (3398) | Institute of Information and Communication Technologies Bulgarian Academy of Sciences | BGR | |
| 8 (3470) | Technical University of Varna | BGR | |
| 9 (3602) | University of Rousse | BGR | |
| 10 (3862) | South West University Neofit Rilski | BGR | |
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