On C-co-epi-retractable Modules. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 12, n. 3, p. 1187–1198, 2019. DOI: 10.29020/nybg.ejpam.v12i3.3461. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3461. Acesso em: 24 nov. 2024.