Opis na Evreĭskite Staropechatni Knigi v Bŭlgarii︠a︡. Descriptive catalogue of the old printed Hebrew books in Bulgaria /
Institut za balkanistika (Bŭlgarska akademii︠a︡ na naukite)
Eshkenazi, Eli.
Gichev, Strakhil.
Sofii︠a︡,
1966.