Madelung, Wilferd. The succession to Muı̀Æammad : a study of the early Caliphate / Wilferd Madelung. - Cambridge ; New York, NY, USA : Cambridge University Press, 1997. - xviii, 413 p. : ill. ; 24 cm. ISBN: 0521561817 9780521561815 LCCN: 95026105 LC Class. No.: DS38.1 / .M336 1997 Dewey Class. No.: 297