Kirilo-Metodievska entsiklopedii︠a︡ /
Dinekov, Petur.
Sofiia : Izd-vo BAN,
1985-2003.
Includes bibliographical references and index.
t. 1. A-Z --  t. 2. I-O -- t. 3. P-S -- t. 4. T-I︠A, dopʺnenie.
Cyril, Saint, Apostle of the Slavs, approximately 827-869.
Methodius, Saint, Apostle of the Slavs, approximately 825-884 or 885
Church Slavic philology