ANJUM, T. ’Osmān Sayyid Ahmad Ismā’īl Al-Bīlī . Prelude to the Generals: A Study of Some Aspects of the Reign of the Eighth ’Abbāsid Caliph, Al-Mu’taṣim Bi-Allah (218-277 AH/833-842 AD). . Islamic Studies, v. 41, n. 4, p. 763-769, 31 Dec. 2002.