JASIM, Mustafa Mohammed; KHALID, Wasan. 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://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/11549.. Acesso em: 6 dec. 2025.