Approximate Regular Modules. Baghdad Science Journal, Iraq, Baghdad, v. 8, n. 4, p. 1021–1027, 2011. DOI: 10.21123/bsj.2011.8.4.1021-1027. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/1324.. Acesso em: 9 may. 2024.