תאריך הלידה המדויק על פי: ''Moslem schisms and sects (al-Fark bain al-firak): being the history of the various philosophic systems developed in Islam / by Abū-Mansur `Abd-al-Kāhir ibn Tāhir al-Baghdādī (d. 1037); Part I was translated from the Arabic by Kate Chambers Seelye and appeared in 1919 as Columbia University Oriental Studies, vol. XV. Part II tr. with introduction and notes by Abraham S. Halkin, Ph.D., issued also as thesis (Ph.D.)- Columbia University, 1935, Tel Aviv: Palestine publishing co., ltd., 1935, "abraham+S+halkin"+1903&dq="abraham+S+halkin"+1903&hl=iw&ei=HiMyTceODaSM4gaEvKXMCg&sa=X&oi=book_result&ct=result&resnum=10&ved=0CFcQ6AEwCQ עמ' 263. (באנגלית)
