Madelung, W., & Schmidtke, S. (2006). Rational theology in interfaith communication: Abu l-Husayn al-Basri's Mu'tazili theology among the Karaites in the Fatimid Age. Brill.

Madelung, Wilferd, and Sabine Schmidtke. Rational Theology in Interfaith Communication: Abu L-Husayn Al-Basri's Mu'tazili Theology Among the Karaites in the Fatimid Age. Leiden ; Boston: Brill, 2006.

Madelung, Wilferd, and Sabine Schmidtke. Rational Theology in Interfaith Communication: Abu L-Husayn Al-Basri's Mu'tazili Theology Among the Karaites in the Fatimid Age. Brill, 2006.