JAFF, R.; LAWA, F. Biostratigraphy and Systematic Palaeontology of Late Cretaceous Heterohelicidae Foraminifera from Kurdistan Region North-eastern Iraq. Iraqi National Journal of Earth Science (INJES), [S. l.], v. 20, n. 2, p. 33–63, 2020. DOI: 10.33899/earth.2020.170360. Disponível em: https://ojs.uomosul.edu.iq/index.php/injes/article/view/40746. Acesso em: 3 sep. 2025.