Weak Essential Submodules. Baghdad Science Journal, Iraq, Baghdad, v. 6, n. 1, p. 214–221, 2009. DOI: 10.21123/bsj.2009.6.1.214-221. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/972.. Acesso em: 5 may. 2024.