AL-MOTHAFAR, Nuhad; YASSIN, Sahira. On δ-Small Projective Modules. Iraqi Journal of Science, [S. l.], v. 54, n. 3. Mathematics conf, p. 855–860, 2024. Disponível em: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/12503.. Acesso em: 7 dec. 2025.