T. . Anjum, “ ’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). ”, IS, vol. 41, no. 4, pp. 763–769, Dec. 2002.