Alkhaykanee, Mustafa H., and Salam Ismeal Al-Dulaimi. 2019. “Biostratigraphy of Euphrates, Dhiban, and Jeribe Formations in Ajil Oil Field, Salah Al-Deen Governorate, Central Iraq”. Iraqi Journal of Science 60 (2): 263-76. https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/587.