The Dynamics Of Islamic Civilization During The Appointment Process Of Caliph Umar Bin Khattab. Luxfia: Journal of Multidisciplinary Research, [S. l.], v. 1, n. 02, p. 137–147, 2026. Disponível em: https://risetcendikia.com/index.php/journal-luxfia/article/view/311.. Acesso em: 2 sep. 2026.