al-Rashid, Saad Bin ʿAbdulaziz. “Al-Ṣuwaydirah (old Al-Ṭaraf) and Its Early Islamic Inscriptions”. Proceedings of the Seminar for Arabian Studies, vol. 41, Sept. 2011, pp. 295-09, https://archaeopresspublishing.com/ojs/index.php/PSAS/article/view/1695.