For example, Ephraim Isaac, “An Obscure Component in Ethiopian Church History,” Le Museon 85 (1972), pp. 225–258; Isaac, A Text-Critical Introduction to Mashafa Berhan (Leiden: E.J. Brill, 1973), pp. 109, 116, 118, etc.; E. Hammerschmidt, Jewish Elements in the Cult of the Ethiopian Church,” Journal of Ethiopian Studies (1965), pp. 1–12; E. Ullendorff, Ethiopia and the Bible (Oxford The British Academy/Oxford Univ. Press, 1968), pp. 82–87; M. Rodinson, “Sur la question des influences juives en Ethiopie,” Journal of Semitic Studies 9 (1964), pp. 11–19; H. Ludolf, Commentarius ad suam Historiam Aethiopicam (Frankfort, 1961); J.S. Trimmingham, Islam in Ethiopia (London Frank cass. 1952); C. Rathjens, Die Juden in Abessinien (Hamburg, 1921), p. 48; H.M. Hyatt, The Church of Abyssinia (London, 1928), pp. 169ff; T. Bent, The Sacred City of the Ethiopians (London, 1893), pp. 55ff.