BÜYÜKASIK, E.; LOMP, C. Rings whose modules are weakly supplemented are perfect. Applications to certain ring extensions. MATHEMATICA SCANDINAVICA, [S. l.], v. 105, n. 1, p. 25–30, 2009. DOI: 10.7146/math.scand.a-15104. Disponível em: https://www.mscand.dk/article/view/15104. Acesso em: 16 apr. 2024.