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ΧΡΙΣΤΙΑΝΙΚΗ ΑΡΧΑΙΟΛΟΓΙΚΗ ΕΤΑΙΡΕΙΑ (ΧΑΕ) 2013. †The unforgettable queen Olga. Deltion of the Christian Archaeological Society. 3, 1-2 (Apr. 2013), 92–93. DOI:https://doi.org/10.12681/dchae.1325.