| 1 (503) | Bulgarian Academy of Sciences * | BGR |  |
| 2 (513) | Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences | BGR | |
| 3 (558) | Sofia University | BGR |  |
| 4 (713) | Georgi Nadjakov Institute of Solid State Physic Bulgarian Academy of Sciences | BGR | |
| 5 (721) | Technical University of Sofia | BGR | |
| 6 (725) | University of Chemical Technology and Metallurgy | BGR | |
| 7 (741) | Academician Emil Djakov Institute of Electronics Bulgarian Academy of Sciences | BGR | |
| 8 (767) | Institute of General and Inorganic Chemistry Bulgarian Academy of Sciences | BGR | |
| 9 (771) | Institute of Mechanics Bulgarian Academy of Sciences | BGR | |
| 10 (789) | University of Plovdiv Paisii Hilendarski | BGR | |
| 11 (821) | Institute of Mathematics and Informatics Bulgarian Academy of Sciences | BGR | |
| 12 (845) | University of Rousse | BGR | |
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