См. John Spencer Trimingham, Islam in the Sudan (London: Oxford University Press, 1949), pp.102-4; Islam in Ethiopia (London: Oxford University Press, 1952), pp.104-17; History of Islam in West Africa (London: Oxford University Press, 1962), p.l55ff; J.N.D.Anderson, «Tropical Africa: Infiltration and Expanding Horizon» in Gustav E. von Grunebaum (ed.), Unity and Variety in Muslim Civilization (Chicago: University of Chicago Press, 1955), pp.261-83.
