R*-Small Submodules and -Hollow Modules. Iraqi Journal of Science, [S. l.], v. 66, n. 2, p. 652–658, 2025. DOI: 10.24996/ijs.2025.66.2.9. Disponível em: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/11549.. Acesso em: 19 jul. 2025.