Usman, Muhammad Abduh, Amer Abdulwahab Mahyoub Murshed, and Mohamad Zaidi bin Abdul Rahman. 2020. “النظام القبلي في اليمن ومكوناته وموقف الشريعة اللإسلامية منه: The Tribal System in Yemen And the Position of Islamic Law on It”. Al-Muqaddimah: Online Journal of Islamic History and Civilization 7 (2):53-65. https://ejournal.um.edu.my/index.php/MUQADDIMAH/article/view/24313.