On Preradical of Semimodules. Baghdad Science Journal, Iraq, Baghdad, v. 15, n. 4, p. 0472, 2018. DOI: 10.21123/bsj.2018.15.4.0472. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/44.. Acesso em: 28 apr. 2024.