den Heijer, J. (1993). The Composition of the History of the Churches and Monasteries of Egypt : Some Preliminary Remarks. In T. Orlandi, D.W. Johnson (ed.), Acts of the Fifth International Congress of Coptic Studies, Washington, 12-15 August 1992, Vol. 2, Papers from the Sections 1-2 (p. p. 209-219). C.I.M. https://hdl.handle.net/2078.5/84655