Đọc thêm Ioannes_III_Doukas

Đọc thêm Ioannes_III_Doukas_Vatatzes

Chisholm, Hugh biên tập (1911). “John III (Roman emperor)”. Encyclopædia Britannica 15 (ấn bản 11). Nhà in Đại học Cambridge. tr. 438.
"John Vatatzes" entry in The Oxford Dictionary of Byzantium. Alexander Kazhdan (ed.) Oxford University Press, 1991.
Fine, John Van Antwerp (1994). The Late Medieval Balkans: A Critical Survey from the Late Twelfth Century to the Ottoman Conquest. Ann Arbor: University of Michigan Press. ISBN 978-0-472-08260-5.
Jonathan Harris, Byzantium and the Crusades, London: Bloomsbury, 2nd ed., 2014. ISBN 978-1-78093-767-0
John S. Langdon. Byzantium’s Last Imperial Offensive in Asia Minor: The Documentary Evidence for and Hagiographical Lore About John III Ducas Vatatzes’ Crusade Against the Turks, 1222 or 1225 to 1231. New Rochelle, N.Y.: A.D. Caratzas, 1992.
George Ostrogorsky. History of the Byzantine State. New Brunswick, N.J: Rutgers University Press, 1969.

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