Kennedy, Hugh, The Armies of the Caliphs: Military and Society in the Early Islamic State, Routledge, 2001.
al-Muqarram, Abd al Razzaq, Maqtal al-Husayn, Martyrdom Epic of Imam al-Husayn, translated by Yasin T. Al-Jibouri, pub Al-Kharsan Foundation for Publications, originally published Qum, circa 1990. (al-Muqarram was born in 1899 and died in 1971—author's biography. This is a 20th-century book—see Islamic Historiography, by Chase F. Robinson, p. 35.)