Mackeen, A. M. Mohamed (1971). "The Early History of Sufism in the Maghrib Prior to Al-Shādhilī (d. 656/1258)". Journal of the American Oriental Society. 91 (3): 398–408. doi:10.2307/600258. JSTOR600258.
Mackeen, A. M. Mohamed (1971). "The Early History of Sufism in the Maghrib Prior to Al-Shādhilī (d. 656/1258)". Journal of the American Oriental Society. 91 (3): 398–408. doi:10.2307/600258. JSTOR600258.