Sprenger, , 1859, Uber das Traditionswesen bei den Arabern, ZDMG, 10.
A.J. Wensink, 1932, The Muslim Creed, Cambridge, London, Cambridge university.
Abbott, Nabia, 1967, Studies in Arabic Literary Papyri II: Qur'anic Commentary and Tradition. The university of Chicago Oriental Institue Publications, Volume 76. Chicago: The University of Chicago Press.
Al-azami, Muhammad Mustafa, 2003, The History of the Quranic Text from Revelation to Complation: A Comparative Study with the Old and New Testaments, Leicester: Uk IsIsmic Academy.
Aloys, sprenger, 1861, Das Leben and die Lehre des Mohammad, 3 volumes. Berlin: Nicholai,sche Verlagsbuchhandlug.
Barthelemy d'herbelot, 1697, Biblothe'que orientable, ou dictionarie universal, paris.
Berg, Herber, 2003 , “Competing Paradigms in Islamic Origins Quran 15:89-91 and the Value of Isnads", in: Herbert Berg (ed). Method and Thery in the Study of Islamic Origins, Brill, Leiden.
Donner, Fred M. (1998), Narratives of Islamic origins: the beginnings of Islamic historical writing, THE DARWIN PRESS, INC. PRINCETON, NEW JERSEy.
Donner, Fred M. (1998), Narratives of Islamic origins: the beginnings of Islamic historical writing, THE DARWIN PRESS, INC. PRINCETON, NEW JERSEY.
Donner, Fred M. (1998), Narratives of Islamic origins: the beginnings of Islamic historical writing, THE DARWIN PRESS, INC. PRINCETON, NEW JERSEY.
Juynboll, G.H.A. 1983 ,“Muslim Tradition: studies in Chronology, provenance and Authorship of Early Hadith”, Cambridge: Cambridge University press.
Nevo, Yehuda and Koren, Judith(1991), "Methodological Approaches to Islamic Studies," Der Islam.
Sadeghi, Behnam g Goudaezi, Mohsen, “San’ a’ 1 and the Origins of the Qur’an, Der Islam, 2012 .
Schacht, Joseph, 1950, The Origins of Muhammadan Jurisprudence, Oxford.
Schoeler, Gregor (2003), “Foundations for a new Biography of Muhammad: The production and evaluation of the corpus of traditions from Urwah b.Al-zumayr”. In: Herbert Berg, (ed), Method and Theory in the Study of Islamic Origins, Brill, Leiden.
Whelan, Estelle (1998), Forgotten Witness: Evidence for the Early Codification of the Qur'an, Journal of the American Oriental Society, Vol. 118, Issue 1, January-March, p 4.