Jackson, P., ‘The Crusades of 1239–41 and Their Aftermath’ in Bulletin of the School of Oriental and African Studies, University of London 50 (1987).
501
Barber and Bate, Letters from the East, 126–7.
502
La Monte and Hubert, The Wars of Frederick II, 89.
503
Huillard-Bréholles, J. L. A., Historia diplomatica Friderici Secundi III (Paris: 1852), 135–40; в переводе на английский (процитированном здесь) см.: Peters, E. (ed.), Christian Society and the Crusades 1198–1229: Sources in Translation including the Capture of Damietta by Oliver of Paderborn (Philadelphia: 1948), 165–70.
