Adam of Usk, tr. E. M. Thompson, The Chronicle of Adam of Usk, AD 1377–1421 (2nd edn; Oxford, 1904). P. 220.
Demetrios Kydones, tr. Speros Vryonis Jr., The Decline of Medieval Hellinism in Asia Minor and the Process of Islamization from the Eleventh through the Fifteenth Century (Berkeley/Los Angeles/ London, 1986). P. 307, 286.