E. CHRISTENSEN, A. E. Ladewig Petersen: ’Ali and Mu’awiya in Early Arabic Tradition. Odense University Studies in History and Social Sciences vol. 18. Odense, Universitetsforlaget 1974. 264 s.; 60,00 kr. -|- moms. Historisk Tidsskrift, v. 13, 1 jan. 1975.