@book{Madelung1989, author="Wilferd Madelung", title="Imam al-Qasim ibn Ibrahim and Mutazilism", year="1989", booktitle="On Both Sides of Al-Mandab: Ethiopia, South-Arabic and Islamic Studies Presented to Oscar Löfgren on his ninetieth birthday 13 May 1988", publisher="Swedish Research Institute in Istanbul", edition="Transactions Vol. 2", address="Istanbul", pages="39-48", keyword0="Zaydi Islam", type="chapter" }