Sunnat al-Khulafa' al-Rashidin : bahth fi al-mafhum wa al-hujjiyah - Bu Shu'ara', Zayd (al-Qahirah : Dar al-Salam, 2011)
Originally presented as the author's thesis (M.A)
Keywords: Caliphs in the Hadith; Hadith -- Evidences, authority, etc; Hadith -- Criticism, interpretation, etc