"The research leading to this database has received funding from the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013) / ERC grant agreement n°322849"
- Edited in Kitāb al-imāma wa-al-siyāsa on page
- Edited in Ta’rīḫ al-ḫulafā’ al-rāšidūn wa-dawlat banī Um... on page
- Discussed in Encyclopaedia of Islam II Online on page http://referenceworks.brillonline.com/entries/encyclopaedia-of-islam-2/ibn-kutayba-COM_0333