Geanakoplos, Deno John (1959). Emperor Michael Palaeologus and the West, 1258–1282: A Study in Byzantine-Latin Relations, p. 297. Cambridge, Massachusetts: Harvard University Press. OCLC101176343.
Geanakoplos, Deno John (1959). Emperor Michael Palaeologus and the West, 1258–1282: A Study in Byzantine-Latin Relations, p. 276. Cambridge, Massachusetts: Harvard University Press. OCLC101176343.