S. ABBAS, M.; MEHDI. Purity And Projectivity Relative To A Submodule. IRAQI JOURNAL OF STATISTICAL SCIENCES, [S. l.], v. 13, n. 3, p. 49–63, 2025. Disponível em: https://ojs.uomosul.edu.iq/index.php/stats/article/view/20876. Acesso em: 6 aug. 2025.