Tebyan. ↑ Kennedy, Hugh (1986). The Prophet and the Age of the Caliphates, 2nd ed. London and New York: Pearson Longman. pp. 148–150. ↑ Mohammad hossein, Yasrebi. هشتمین امام و هشت شاگرد برجسته [The Eighth Imam and the Eight Outstanding Disciples].