Jackson Williams 2007, p. 174; Miller 1923, p. 19. Miller, William (1923). "The Empire of Nicaea and the Recovery of Constantinople". In Bury, J. B. (ed.). The Cambridge Medieval History: Volume IV: The Eastern Roman Empire (717–1453). Cambridge: Cambridge University Press. OCLC716982674.
Jackson Williams 2007, pp. 177–178; Miller 1923, p. 48. Miller, William (1923). "The Empire of Nicaea and the Recovery of Constantinople". In Bury, J. B. (ed.). The Cambridge Medieval History: Volume IV: The Eastern Roman Empire (717–1453). Cambridge: Cambridge University Press. OCLC716982674.
Jackson Williams 2007, p. 177; Miller 1923, p. 49. Miller, William (1923). "The Empire of Nicaea and the Recovery of Constantinople". In Bury, J. B. (ed.). The Cambridge Medieval History: Volume IV: The Eastern Roman Empire (717–1453). Cambridge: Cambridge University Press. OCLC716982674.