ABDELKADER, Salim Bourchid; M’HAMED, Hamidouche; ZIAN, Abderrazak Ahmed. Concentration and Specialization of Economic Activities in the Kingdom of Saudi Arabia. Shirkah: Journal of Economics and Business, [S. l.], v. 5, n. 3, p. 362–385, 2020. DOI: 10.22515/shirkah.v5i3.348. Disponível em: https://shirkah.or.id/new-ojs/index.php/home/article/view/348. Acesso em: 24 feb. 2025.