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Holt, Peter Malcolm. The Age of the Crusades: The Near East from the Eleventh Century to 1517. Routledge. 2013 [1986]. ISBN 978-1-317-87152-1. Holt
Anlage [Annex] 26 (PDF). [2021-07-08]. （原始内容 (PDF)存档于2017-08-14）. The Italian Declaration of Neutrality - World War I Document Archive. wwi.lib.byu.edu
Petrovich Kazhdan, Annabel Jane Wharton, Change in Byzantine Culture in the Eleventh and Twelfth Centuries, University of California Press, 1985, p. 122. Marina
Committee on the Problem of Hungary, General Assembly, Official Records, Eleventh Session, Supplement No. 18 (A/3592), New York, 1957 (268 pages) (PDF).