Abu l-Qasim al-BustiSchmidtke, SabineSabineSchmidtkeMadelung, WilferdWilferdMadelung2017-11-132017-11-132003Abu l-Qāsim al-Bustī: Kitāb al-Baḥth ʿan adillat al-takfīr wa l-tafsīq (Investigation of the evidence for charging with kufr and fisq). Eds. Wilferd Madelung and Sabine Schmidtke, Tehran: Iran University Press, 1382/20039789640111260https://hdl.handle.net/20.500.12111/99otherAbu l-Qasim al-BustiZaydiyyaBook0000-0002-6181-5065