Map showing the course of the <i>mihnah</i> or Islamic Inquisition, 833-852 AD. Sources were primarily as follows:
<ul><li>Hinds, M. "Mihna". <i>The Encyclopedia of Islam, New Edition, Volume VII: Mif–Naz.</i> Leiden and New York: BRILL, 1993. <a href="//commons.wikimedia.org/wiki/Special:BookSources/90-04-09419-9" title="Special:BookSources/90-04-09419-9">ISBN 90-04-09419-9</a>. pp. 2-6</li>
<li>Hurvitz, Nimrod. <i>The Formation of Hanbalism: Piety into Power.</i> New York: Routledge, 2002. <a href="//commons.wikimedia.org/wiki/Special:BookSources/0-7007-1507-X" title="Special:BookSources/0-7007-1507-X">ISBN 0-7007-1507-X</a>. pp. 125-27</li>
<li>Melchert, Christopher. "Religious Policies of the Caliphs from al-Mutawakkil to al-Muqtadir: AH 232-295/AD 847-908". <i>Islamic Law and Society</i> 3 (3), 1996. Retrieved March 29, 2016. pp. 320 f..</li></ul>
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