AHMED, Z. .; AHMAD, Z. USHR AND ’USHR LAND: USHR. Islamic Studies, [S. l.], v. 19, n. 2, p. 76–94, 1980. DOI: 10.52541/isiri.v19i2.5272. Disponível em: http://irigs.iiu.edu.pk:64447/ojs/index.php/islamicstudies/article/view/5272. Acesso em: 6 dec. 2025.