| 1 (1989) | Bulgarian Academy of Sciences * | BGR |  |
| 2 (2368) | Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences | BGR | |
| 3 (2592) | Institute of Mathematics and Informatics Bulgarian Academy of Sciences | BGR | |
| 4 (3010) | Trakia University | BGR |  |
| 5 (3014) | University of Rousse | BGR | |
| 6 (3243) | Technical University of Sofia | BGR | |
| 7 (3365) | Sofia University | BGR | |
| 8 (3492) | Institute of Information and Communication Technologies Bulgarian Academy of Sciences | BGR | |
| 9 (3588) | University of Chemical Technology and Metallurgy | BGR | |
| 10 (3788) | University of Plovdiv Paisii Hilendarski | BGR | |
| 11 (3993) | University of Food Technologies, Plovdiv | BGR | |
| 12 (4122) | Technical University of Varna | BGR | |
| 13 (4287) | University Prof. Dr. Assen Zlatarov | BGR | |
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