Badel, Émilie, and Prof. Ulrich Kramm. “Mineralogical Investigations of Raʾs Al Jinz 2 Bitumen (Jaʿalān, Sultanate of Oman)”. Proceedings of the Seminar for Arabian Studies 44 (September 1, 2014): 25–35. Accessed October 8, 2025. https://archaeopresspublishing.com/ojs/index.php/PSAS/article/view/1373.