{"id":"000496608","type":"article","title":"The mosaics of Hagia Sophia at Istanbul. The portrait of the emperor Alexander. A report on work done by the Byzantine Institute in 1959 and 1960","pages":"187-218","container-title":"Dumbarton Oaks Papers, 15.1961","author":[{"family":"Underwood","given":"P.A."}],"issued":{"raw":"1961"}}