H. A. MacMichael, A history of the Arabs in the Sudan, Cambridge 1922, I, 271-306, (see also index); idem, The tribes of northern and central Kordofan, Cambridge 1912, 140-155; G. Nachtigal, Saha  ra  und Su  da  n, Leipzig 1889, III, 206 ff., 453ff. R. C. Slatin, Fire and sword in the Sudan, London 1896, 45 ff.;
مقالات مندرج در
Sudan notes and records, Khartoum 1918-,
از جمله :
K. D. D. Henderson,"A note on the migration of the Messiria tribe into south west Kordofan", SNR, xx /   1 (1939), 49-77; I. Cunnison, "The Humr and their land", SNR, xxxv/2 (1954 50-68. (
Richard Hill, A biographical dictionary of the Sudan, 2nd ed., London 1967; The New Encyclopaedia Britannica, Chicago 1985, Micropaedia, s.v."Baqqa  rah", Macropaedia, s.v. "Sudan "; F. R. Wingate, Ten years' captivity in the Mahdi' s camp (1882-1892), London 1986.