…достиг с мусульманскими послами соглашения … — Aziz Ahmad, History of Islamic Sicily, 5; McCormick, Origins of the European Economy, 900.
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Аглабиды начали … — Aziz Ahmad, History of Islamic Sicily, 5–11; Ostrogorsky, History of the Byzantine State, 208 и McCormick, Origins of the European Economy, 906–7.
