Abdullah, A. A.- K., S. Al - Bub, and W. Hamado. “Litostratigraphic Study of the Jurassic – Cretaceous Boundary in Querdaha Sheet - The Syrian Coastal Chain”. Tishreen University Journal -Basic Sciences Series, vol. 43, no. 6, Jan. 2022, pp. 73-92, http://journal.tishreen.edu.sy/index.php/bassnc/article/view/11512.