Mohammed , Mamoun Ubaid. “Micropaleontological Aspects of the ‘Calcite Eyes’ Phenomenon in the Family Orbitolinidae”. Iraqi Journal of Science 57, no. 2C (June 24, 2022): 1462–1468. Accessed December 8, 2025. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/7144.