VOLL, J. O. . THE MAHDĪ’S CONCEPT AND USE OF ’HIJRAH’ . Islamic Studies, [S. l.], v. 26, n. 01, p. 31–42, 1987. DOI: 10.52541/isiri.v26i01.5502. Disponível em: http://irigs.iiu.edu.pk:64447/ojs/index.php/islamicstudies/article/view/5502. Acesso em: 21 feb. 2026.