Barber and Bate, Letters from the East, 165.

Langlois, E. (ed.), Registres de Nicholas IV: recueil des bulles de ce pape II (Paris: 1891), 903. См. также: Schein, S., Fideles Crucis: The Papacy, The West and The Recovery of the Holy Land 1274–1314 (Oxford: 1991), 74–76.