- Institut za istorii︠a︡ (Bŭlgarska akademii︠a︡ na naukite) (6)
- Tŭpkova-Zaimova, Vasilka (3)
- Voĭnov, Mikhail (3)
- Ĭonchev, Li︠u︡bomir (3)
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- Iliev, Ilii︠a︡ (Ilii︠a︡ Georgiev) (1)
- Institut za bŭlgarska istorii︠a︡ (Bŭlgarska akademii︠a︡ na naukite) (1)
- Lishev, Strashimir (1)
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