Mohamed W. Alkhafaji. "Organic Petrology of Ora Formation in Akkas Field, Western Iraq". Tikrit Journal of Pure Science 22, no. 9 (فبراير 1, 2023): 76–82. تاريخ الوصول مايو 18, 2024. https://tjps.tu.edu.iq/index.php/tjps/article/view/878.