TransliterationGeorgiev E. Kiril i Metodij, osnovopolozhnici na slavyanskite literaturi. Kirill i Mefodij, osnovateli slavyanskoj literatury. In Russian
In EnglishGeorgiev E. Kiril and Metodij, osnovopolozhnici the slavyanskite muzichnoy. Cyril and Methodius, founders Slavic literature. In Russian, Sofia
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