HÀ, N. T. T. Some characterizations of small projective modules. Hue University Journal of Science: Natural Science, [S. l.], v. 129, n. 1C, p. 117-123, 2020. DOI: 10.26459/hueuni-jns.v129i1C.5811. Disponível em: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/5811. Acesso em: 21 nov. 2024.