Direct sum of π-projective semimodules. Iraqi Journal of Science, [S. l.], v. 63, n. 1, p. 214–221, 2022. DOI: 10.24996/ijs.2022.63.1.22. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/3527.. Acesso em: 27 apr. 2024.