al-Shar'iyah bayna fiqh al-khilafah wa waqi'iha - Salih, Amani (al-Qahirah : al-Ma'had al-'Alami lil Fikr al-Islami, 2006)
Keywords: Caliphate; Islamic law -- Interpretation and construction; Constitutional law (Islamic law); Islamic Empire -- History -- 622-661