1 (907) | Bulgarian Academy of Sciences * | BGR | ||
2 (1410) | Sofia University | BGR | ||
3 (1793) | Institute of Mathematics and Informatics Bulgarian Academy of Sciences | BGR | ||
4 (2102) | South West University Neofit Rilski | BGR | ||
5 (2288) | University of Plovdiv Paisii Hilendarski | BGR | ||