Nicol 1997. "But he was proud also to adopt the more glorious title of despot of Romania and to signify to the world the Hellenism of his heritage by signing his decrees and documents in Greek letters inscribed in the red ink of a true Byzantine despot" Nicol, Donald MacGillivray (1997). "Late Byzantine Period (1204–1479)". Epirus, 4000 Years of Greek History and Civilization. Ekdotike Athenon. pp. 198–237. ISBN9789602133712. Retrieved 11 March 2015.