John O. Voll, ‘Fundamentalisms in the Sunni Arab World: Egypt and the Sudan’, in Martin E. Marty and R. Scott Appleby, eds, Fundamentalisms Observed (Chicago and London, 1991), pp. 369–74; Yvonne Haddad, ‘Sayyid Qutb’, in Esposito, ed., Voices of Resurgent Islam; Choueiri, Islamic Fundamentalism, pp. 96–151