WALBRIDGE, J. . The Caliphate of Reason. Islamic Studies, [S. l.], v. 43, n. 4, p. 583–597, 2004. DOI: 10.52541/isiri.v43i4.4789. Disponível em: http://irigs.iiu.edu.pk:64447/ojs/index.php/islamicstudies/article/view/4789. Acesso em: 6 dec. 2025.