G. Ostrogorsky, Byzantium in the Seventh Century, D.O.P., XIII, 1959, pp. 3-21. D.M. Metcalf, The Slavonic Threat to Greece, Hesperia, 31, 1962, pp. 134-157. Wachsmuth, Stadt Athen, I, p. 721, note 2 ... Agora 14 216 ... Ostrogorsky, Byzantium in the Seventh Century, D.O.P., XIII, 1959, pp. 3-21 ... Frantz, D.O.P., XIX, 1965, p. 199 ... Frantz, D.O.P., XIX, 1965, pp. 202-205
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