Shaw, Stanford J.; Shaw, Ezel Kural (1997) [1976]. History of the Ottoman Empire and Modern Turkey. Vol. 1. Empire of the Gazis: The Rise and Decline of the Ottoman Empire 1280-1808. Cambridge, New York, Melbourne: Cambridge University Press. p. 13. ISBN9780521291637.
Geanakoplos, Deno John (1959). Emperor Michael Palaeologus and the West, 1258-1282: A Study in Byzantine-Latin Relations, pp. 341–42. Cambridge, Massachusetts: Harvard University Press. OCLC1011763434.
Barrow, G. W. S. (1965). Robert Bruce and the Community of the Realm of Scotland, pp. 3–4. London, UK: Eyre and Spottiswoode. OCLC655056131.
Miller, William (1921). "The Zaccaria of Phocaea and Chios (1275-1329)". Essays on the Latin Orient, p. 284. Cambridge: Cambridge University Press. OCLC457893641.