| 1 (1937) | Bulgarian Academy of Sciences * | BGR | |
| 2 (3261) | Institute of Mathematics and Informatics Bulgarian Academy of Sciences | BGR | |
| 3 (3480) | Institute of Biophysics and Biomedical Engineering Bulgarian Academy of Sciences | BGR | |
| 4 (3499) | Institute of Information and Communication Technologies Bulgarian Academy of Sciences | BGR | |
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