GdlH
@Aḥmed ibn Ḥanbal and the Miḥna : a contribution to a biography of the imâm and to the history of the mohammedan inquisition called the Miḥna, 218-234 A.H. / Walter M. Patton
Islamitische inquisitie tijdens het kalifaat van al-Maʾmūn
Encyclopaedia of Islam, 2nd ed.
Miḥna